23735643973 has 2 divisors, whose sum is σ = 23735643974. Its totient is φ = 23735643972.

The previous prime is 23735643959. The next prime is 23735644013. The reversal of 23735643973 is 37934653732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14645356324 + 9090287649 = 121018^2 + 95343^2 .

It is a cyclic number.

It is not a de Polignac number, because 23735643973 - 2⁹ = 23735643461 is a prime.

It is a super-2 number, since 2×23735643973² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23735643973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23735643913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11867821986 + 11867821987.

It is an arithmetic number, because the mean of its divisors is an integer number (11867821987).

Almost surely, 2^23735643973 is an apocalyptic number.

It is an amenable number.

23735643973 is a deficient number, since it is larger than the sum of its proper divisors (1).

23735643973 is an equidigital number, since it uses as much as digits as its factorization.

23735643973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 52.

The spelling of 23735643973 in words is "twenty-three billion, seven hundred thirty-five million, six hundred forty-three thousand, nine hundred seventy-three".