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19468081 is a prime number
BaseRepresentation
bin100101001000…
…0111100110001
31100122002012001
41022100330301
514440434311
61533134001
7324322153
oct112207461
940562161
1019468081
11aa97726
12662a301
134058299
14282aad3
151a984c1
hex1290f31

19468081 has 2 divisors, whose sum is σ = 19468082. Its totient is φ = 19468080.

The previous prime is 19468079. The next prime is 19468087. The reversal of 19468081 is 18086491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14561856 + 4906225 = 3816^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 19468081 - 21 = 19468079 is a prime.

It is a super-2 number, since 2×194680812 = 758012355645122, which contains 22 as substring.

Together with 19468079, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19468081.

It is not a weakly prime, because it can be changed into another prime (19468087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9734040 + 9734041.

It is an arithmetic number, because the mean of its divisors is an integer number (9734041).

Almost surely, 219468081 is an apocalyptic number.

It is an amenable number.

19468081 is a deficient number, since it is larger than the sum of its proper divisors (1).

19468081 is an equidigital number, since it uses as much as digits as its factorization.

19468081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 19468081 is about 4412.2648379262. The cubic root of 19468081 is about 269.0136899193.

The spelling of 19468081 in words is "nineteen million, four hundred sixty-eight thousand, eighty-one".