20112356664 has 48 divisors (see below), whose sum is σ = 54478639800. Its totient is φ = 6703174464.

The previous prime is 20112356639. The next prime is 20112356687. The reversal of 20112356664 is 46665321102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654067 + ... + 684125.

Almost surely, 2^20112356664 is an apocalyptic number.

20112356664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20112356664 is an abundant number, since it is smaller than the sum of its proper divisors (34366283136).

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

20112356664 is a wasteful number, since it uses less digits than its factorization.

20112356664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39364 (or 39357 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 20112356664 its reverse (46665321102), we get a palindrome (66777677766).

The spelling of 20112356664 in words is "twenty billion, one hundred twelve million, three hundred fifty-six thousand, six hundred sixty-four".