20455016563100 has 72 divisors (see below), whose sum is σ = 50761751956608. Its totient is φ = 7008543345600.

The previous prime is 20455016563099. The next prime is 20455016563117. The reversal of 20455016563100 is 136561055402.

It is a super-2 number, since 2×20455016563100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8527286 + ... + 10659485.

Almost surely, 2^{20455016563100} is an apocalyptic number.

20455016563100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20455016563100 is an abundant number, since it is smaller than the sum of its proper divisors (30306735393508).

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

20455016563100 is a wasteful number, since it uses less digits than its factorization.

20455016563100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19188315 (or 19188308 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 20455016563100 in words is "twenty trillion, four hundred fifty-five billion, sixteen million, five hundred sixty-three thousand, one hundred".