25322535021 has 24 divisors (see below), whose sum is σ = 39286918944. Its totient is φ = 14465912160.

The previous prime is 25322534983. The next prime is 25322535053. The reversal of 25322535021 is 12053522352.

It is not a de Polignac number, because 25322535021 - 2³¹ = 23175051373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25322535021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25322535061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 539146 + ... + 584228.

It is an arithmetic number, because the mean of its divisors is an integer number (1636954956).

Almost surely, 2^25322535021 is an apocalyptic number.

25322535021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25322535021 is a deficient number, since it is larger than the sum of its proper divisors (13964383923).

25322535021 is a wasteful number, since it uses less digits than its factorization.

25322535021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48921 (or 48914 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 25322535021 in words is "twenty-five billion, three hundred twenty-two million, five hundred thirty-five thousand, twenty-one".