21020424113332 has 48 divisors (see below), whose sum is σ = 44978992132480. Its totient is φ = 8394696662400.

The previous prime is 21020424113291. The next prime is 21020424113383. The reversal of 21020424113332 is 23331142402012.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 21020424113332.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323837019 + ... + 323901922.

Almost surely, 2^{21020424113332} is an apocalyptic number.

It is an amenable number.

21020424113332 is an abundant number, since it is smaller than the sum of its proper divisors (23958568019148).

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

21020424113332 is a wasteful number, since it uses less digits than its factorization.

21020424113332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647739032 (or 647739030 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21020424113332 its reverse (23331142402012), we get a palindrome (44351566515344).

The spelling of 21020424113332 in words is "twenty-one trillion, twenty billion, four hundred twenty-four million, one hundred thirteen thousand, three hundred thirty-two".