20619340801 has 2 divisors, whose sum is σ = 20619340802. Its totient is φ = 20619340800.

The previous prime is 20619340799. The next prime is 20619340823. The reversal of 20619340801 is 10804391602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20259252225 + 360088576 = 142335^2 + 18976^2 .

It is a cyclic number.

It is not a de Polignac number, because 20619340801 - 2¹ = 20619340799 is a prime.

Together with 20619340799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20619340831) 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, 10309670400 + 10309670401.

It is an arithmetic number, because the mean of its divisors is an integer number (10309670401).

Almost surely, 2^20619340801 is an apocalyptic number.

It is an amenable number.

20619340801 is a deficient number, since it is larger than the sum of its proper divisors (1).

20619340801 is an equidigital number, since it uses as much as digits as its factorization.

20619340801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 20619340801 in words is "twenty billion, six hundred nineteen million, three hundred forty thousand, eight hundred one".