21452522040 has 96 divisors (see below), whose sum is σ = 71969788800. Its totient is φ = 5536131840.

The previous prime is 21452522011. The next prime is 21452522093. The reversal of 21452522040 is 4022525412.

21452522040 is a `hidden beast` number, since 2 + 1 + 452 + 5 + 2 + 204 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21452521995 and 21452522013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 949975 + ... + 972294.

It is an arithmetic number, because the mean of its divisors is an integer number (749685300).

Almost surely, 2^21452522040 is an apocalyptic number.

21452522040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21452522040 is an abundant number, since it is smaller than the sum of its proper divisors (50517266760).

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

21452522040 is a wasteful number, since it uses less digits than its factorization.

21452522040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922317 (or 1922310 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The spelling of 21452522040 in words is "twenty-one billion, four hundred fifty-two million, five hundred twenty-two thousand, forty".