25223921940 has 96 divisors (see below), whose sum is σ = 82898129664. Its totient is φ = 5609640960.

The previous prime is 25223921927. The next prime is 25223921951. The reversal of 25223921940 is 4912932252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 796041 + ... + 827120.

It is an arithmetic number, because the mean of its divisors is an integer number (863522184).

Almost surely, 2^25223921940 is an apocalyptic number.

25223921940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25223921940 is an abundant number, since it is smaller than the sum of its proper divisors (57674207724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25223921940 is a wasteful number, since it uses less digits than its factorization.

25223921940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623217 (or 1623215 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 25223921940 in words is "twenty-five billion, two hundred twenty-three million, nine hundred twenty-one thousand, nine hundred forty".