23400742621 has 8 divisors (see below), whose sum is σ = 23735655000. Its totient is φ = 23067854400.

The previous prime is 23400742609. The next prime is 23400742633. The reversal of 23400742621 is 12624700432.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23400742609) and next prime (23400742633).

It can be written as a sum of positive squares in 4 ways, for example, as 16208854596 + 7191888025 = 127314^2 + 84805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23400742621 - 2⁹ = 23400742109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23400742601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482746 + ... + 529003.

It is an arithmetic number, because the mean of its divisors is an integer number (2966956875).

Almost surely, 2^23400742621 is an apocalyptic number.

It is an amenable number.

23400742621 is a deficient number, since it is larger than the sum of its proper divisors (334912379).

23400742621 is a wasteful number, since it uses less digits than its factorization.

23400742621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012079.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 23400742621 in words is "twenty-three billion, four hundred million, seven hundred forty-two thousand, six hundred twenty-one".