20112551544 has 64 divisors (see below), whose sum is σ = 50593284000. Its totient is φ = 6662707200.

The previous prime is 20112551531. The next prime is 20112551609. The reversal of 20112551544 is 44515521102.

It is a super-2 number, since 2×20112551544² (a number of 21 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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3300052 + ... + 3306140.

Almost surely, 2^20112551544 is an apocalyptic number.

20112551544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20112551544 is an abundant number, since it is smaller than the sum of its proper divisors (30480732456).

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

20112551544 is a wasteful number, since it uses less digits than its factorization.

20112551544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928 (or 6924 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 20112551544 in words is "twenty billion, one hundred twelve million, five hundred fifty-one thousand, five hundred forty-four".