21445015233320 has 64 divisors (see below), whose sum is σ = 58046657788800. Its totient is φ = 6965598931200.

The previous prime is 21445015233319. The next prime is 21445015233337. The reversal of 21445015233320 is 2333251054412.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 2015503631 + ... + 2015514270.

It is an arithmetic number, because the mean of its divisors is an integer number (906979027950).

Almost surely, 2^{21445015233320} is an apocalyptic number.

21445015233320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21445015233320 is an abundant number, since it is smaller than the sum of its proper divisors (36601642555480).

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

21445015233320 is a wasteful number, since it uses less digits than its factorization.

21445015233320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031017938 (or 4031017934 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21445015233320 its reverse (2333251054412), we get a palindrome (23778266287732).

The spelling of 21445015233320 in words is "twenty-one trillion, four hundred forty-five billion, fifteen million, two hundred thirty-three thousand, three hundred twenty".