21050155210020 has 48 divisors (see below), whose sum is σ = 59141596530240. Its totient is φ = 5594216442496.

The previous prime is 21050155210013. The next prime is 21050155210039. The reversal of 21050155210020 is 2001255105012.

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, 598678530 + ... + 598713689.

It is an arithmetic number, because the mean of its divisors is an integer number (1232116594380).

Almost surely, 2^{21050155210020} is an apocalyptic number.

21050155210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21050155210020 is an abundant number, since it is smaller than the sum of its proper divisors (38091441320220).

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

21050155210020 is a wasteful number, since it uses less digits than its factorization.

21050155210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197392524 (or 1197392522 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The spelling of 21050155210020 in words is "twenty-one trillion, fifty billion, one hundred fifty-five million, two hundred ten thousand, twenty".