20320535021200 has 60 divisors (see below), whose sum is σ = 49267976185780. Its totient is φ = 8053643220480.

The previous prime is 20320535021173. The next prime is 20320535021219. The reversal of 20320535021200 is 212053502302.

It can be written as a sum of positive squares in 6 ways, for example, as 21941904384 + 20298593116816 = 148128^2 + 4505396^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232990059 + ... + 233077258.

Almost surely, 2^{20320535021200} is an apocalyptic number.

20320535021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320535021200 is an abundant number, since it is smaller than the sum of its proper divisors (28947441164580).

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

20320535021200 is a wasteful number, since it uses less digits than its factorization.

20320535021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466067444 (or 466067433 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20320535021200 its reverse (212053502302), we get a palindrome (20532588523502).

The spelling of 20320535021200 in words is "twenty trillion, three hundred twenty billion, five hundred thirty-five million, twenty-one thousand, two hundred".