21073374525 has 192 divisors, whose sum is σ = 45162823680. Its totient is φ = 8445254400.

The previous prime is 21073374493. The next prime is 21073374547. The reversal of 21073374525 is 52547337012.

It is not a de Polignac number, because 21073374525 - 2⁵ = 21073374493 is a prime.

It is a super-2 number, since 2×21073374525² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7110694 + ... + 7113656.

It is an arithmetic number, because the mean of its divisors is an integer number (235223040).

Almost surely, 2^21073374525 is an apocalyptic number.

21073374525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21073374525 is an abundant number, since it is smaller than the sum of its proper divisors (24089449155).

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

21073374525 is a wasteful number, since it uses less digits than its factorization.

21073374525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3051 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 39.

The spelling of 21073374525 in words is "twenty-one billion, seventy-three million, three hundred seventy-four thousand, five hundred twenty-five".