21004545324 has 48 divisors (see below), whose sum is σ = 56203354368. Its totient is φ = 5980809408.

The previous prime is 21004545319. The next prime is 21004545329. The reversal of 21004545324 is 42354540012.

It is an interprime number because it is at equal distance from previous prime (21004545319) and next prime (21004545329).

It is a junction number, because it is equal to n+sod(n) for n = 21004545291 and 21004545300.

It is not an unprimeable number, because it can be changed into a prime (21004545329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402102 + ... + 451325.

It is an arithmetic number, because the mean of its divisors is an integer number (1170903216).

Almost surely, 2^21004545324 is an apocalyptic number.

It is an amenable number.

21004545324 is an abundant number, since it is smaller than the sum of its proper divisors (35198809044).

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

21004545324 is a wasteful number, since it uses less digits than its factorization.

21004545324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853734 (or 853732 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 21004545324 in words is "twenty-one billion, four million, five hundred forty-five thousand, three hundred twenty-four".