23040402035021 has 6 divisors (see below), whose sum is σ = 26802100326510. Its totient is φ = 19748916029976.

The previous prime is 23040402034943. The next prime is 23040402035033. The reversal of 23040402035021 is 12053020404032.

It can be written as a sum of positive squares in only one way, i.e., 15055284652996 + 7985117382025 = 3880114^2 + 2825795^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23040402035021 is a prime.

It is a super-2 number, since 2×23040402035021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23040402035921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 235106143166 + ... + 235106143263.

It is an arithmetic number, because the mean of its divisors is an integer number (4467016721085).

Almost surely, 2^{23040402035021} is an apocalyptic number.

It is an amenable number.

23040402035021 is a deficient number, since it is larger than the sum of its proper divisors (3761698291489).

23040402035021 is an equidigital number, since it uses as much as digits as its factorization.

23040402035021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470212286443 (or 470212286436 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 23040402035021 its reverse (12053020404032), we get a palindrome (35093422439053).

The spelling of 23040402035021 in words is "twenty-three trillion, forty billion, four hundred two million, thirty-five thousand, twenty-one".