21532423530 has 64 divisors (see below), whose sum is σ = 52200910080. Its totient is φ = 5683958784.

The previous prime is 21532423463. The next prime is 21532423553. The reversal of 21532423530 is 3532423512.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 4467682 + ... + 4472498.

It is an arithmetic number, because the mean of its divisors is an integer number (815639220).

Almost surely, 2^21532423530 is an apocalyptic number.

21532423530 is an abundant number, since it is smaller than the sum of its proper divisors (30668486550).

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

21532423530 is a wasteful number, since it uses less digits than its factorization.

21532423530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6303.

The product of its (nonzero) digits is 21600, while the sum is 30.

The spelling of 21532423530 in words is "twenty-one billion, five hundred thirty-two million, four hundred twenty-three thousand, five hundred thirty".