23255434021 has 16 divisors (see below), whose sum is σ = 25631907840. Its totient is φ = 21026118960.

The previous prime is 23255433989. The next prime is 23255434031. The reversal of 23255434021 is 12043455232.

It is a cyclic number.

It is not a de Polignac number, because 23255434021 - 2⁵ = 23255433989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23255434031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348601 + ... + 409918.

It is an arithmetic number, because the mean of its divisors is an integer number (1601994240).

Almost surely, 2^23255434021 is an apocalyptic number.

It is an amenable number.

23255434021 is a deficient number, since it is larger than the sum of its proper divisors (2376473819).

23255434021 is a wasteful number, since it uses less digits than its factorization.

23255434021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758616.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 23255434021 its reverse (12043455232), we get a palindrome (35298889253).

The spelling of 23255434021 in words is "twenty-three billion, two hundred fifty-five million, four hundred thirty-four thousand, twenty-one".