20612055504 has 80 divisors (see below), whose sum is σ = 54725316800. Its totient is φ = 6681443328.

The previous prime is 20612055487. The next prime is 20612055509. The reversal of 20612055504 is 40555021602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612055509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450852 + ... + 494460.

It is an arithmetic number, because the mean of its divisors is an integer number (684066460).

Almost surely, 2^20612055504 is an apocalyptic number.

20612055504 is a gapful number since it is divisible by the number (24) 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 20612055504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27362658400).

20612055504 is an abundant number, since it is smaller than the sum of its proper divisors (34113261296).

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

20612055504 is a wasteful number, since it uses less digits than its factorization.

20612055504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43892 (or 43886 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 20612055504 in words is "twenty billion, six hundred twelve million, fifty-five thousand, five hundred four".