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23076781 = 713219507
BaseRepresentation
bin101100000000…
…1111110101101
31121102102101121
41120001332231
521401424111
62142340541
7400102150
oct130017655
947372347
1023076781
1112031a22
12788a751
134a1ca00
1430c9c97
15205c871
hex1601fad

23076781 has 12 divisors (see below), whose sum is σ = 28559712. Its totient is φ = 18257616.

The previous prime is 23076761. The next prime is 23076793. The reversal of 23076781 is 18767032.

It is not a de Polignac number, because 23076781 - 213 = 23068589 is a prime.

It is a super-2 number, since 2×230767812 = 1065075642643922, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23076761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8571 + ... + 10936.

It is an arithmetic number, because the mean of its divisors is an integer number (2379976).

Almost surely, 223076781 is an apocalyptic number.

It is an amenable number.

23076781 is a deficient number, since it is larger than the sum of its proper divisors (5482931).

23076781 is a wasteful number, since it uses less digits than its factorization.

23076781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19540 (or 19527 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 23076781 is about 4803.8298262948. The cubic root of 23076781 is about 284.7028029443.

The spelling of 23076781 in words is "twenty-three million, seventy-six thousand, seven hundred eighty-one".

Divisors: 1 7 13 91 169 1183 19507 136549 253591 1775137 3296683 23076781