20530521452 has 24 divisors (see below), whose sum is σ = 41065143840. Its totient is φ = 8797916160.

The previous prime is 20530521443. The next prime is 20530521463. The reversal of 20530521452 is 25412503502.

It is a super-2 number, since 2×20530521452² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304502 + ... + 365762.

It is an arithmetic number, because the mean of its divisors is an integer number (1711047660).

Almost surely, 2^20530521452 is an apocalyptic number.

It is an amenable number.

20530521452 is an abundant number, since it is smaller than the sum of its proper divisors (20534622388).

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

20530521452 is a wasteful number, since it uses less digits than its factorization.

20530521452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73241 (or 73239 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 20530521452 in words is "twenty billion, five hundred thirty million, five hundred twenty-one thousand, four hundred fifty-two".