20920204495872 has 264 divisors, whose sum is σ = 68099885036400. Its totient is φ = 6339454894080.

The previous prime is 20920204495807. The next prime is 20920204495901. The reversal of 20920204495872 is 27859440202902.

20920204495872 is a `hidden beast` number, since 20 + 92 + 0 + 20 + 449 + 5 + 8 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (264).

It is a super-2 number, since 2×20920204495872² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218704 + ... + 6472112.

Almost surely, 2^{20920204495872} is an apocalyptic number.

20920204495872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20920204495872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34049942518200).

20920204495872 is an abundant number, since it is smaller than the sum of its proper divisors (47179680540528).

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

20920204495872 is a wasteful number, since it uses less digits than its factorization.

20920204495872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253460 (or 6253425 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 20920204495872 in words is "twenty trillion, nine hundred twenty billion, two hundred four million, four hundred ninety-five thousand, eight hundred seventy-two".