21034311862925 has 48 divisors (see below), whose sum is σ = 28213163384832. Its totient is φ = 15495816422400.

The previous prime is 21034311862877. The next prime is 21034311862939. The reversal of 21034311862925 is 52926811343012.

It is not a de Polignac number, because 21034311862925 - 2²⁴ = 21034295085709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21034311862925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64816820 + ... + 65140530.

It is an arithmetic number, because the mean of its divisors is an integer number (587774237184).

Almost surely, 2^{21034311862925} is an apocalyptic number.

21034311862925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21034311862925 is a deficient number, since it is larger than the sum of its proper divisors (7178851521907).

21034311862925 is a wasteful number, since it uses less digits than its factorization.

21034311862925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327038 (or 327033 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 21034311862925 in words is "twenty-one trillion, thirty-four billion, three hundred eleven million, eight hundred sixty-two thousand, nine hundred twenty-five".