20453253444636 has 48 divisors (see below), whose sum is σ = 48837247033344. Its totient is φ = 6658772996736.

The previous prime is 20453253444599. The next prime is 20453253444721. The reversal of 20453253444636 is 63644435235402.

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, 6860901 + ... + 9379683.

It is an arithmetic number, because the mean of its divisors is an integer number (1017442646528).

Almost surely, 2^{20453253444636} is an apocalyptic number.

It is an amenable number.

20453253444636 is an abundant number, since it is smaller than the sum of its proper divisors (28383993588708).

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

20453253444636 is a wasteful number, since it uses less digits than its factorization.

20453253444636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534570 (or 2534568 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 51.

The spelling of 20453253444636 in words is "twenty trillion, four hundred fifty-three billion, two hundred fifty-three million, four hundred forty-four thousand, six hundred thirty-six".