20662688176 has 80 divisors (see below), whose sum is σ = 46438416640. Its totient is φ = 8824515840.

The previous prime is 20662688153. The next prime is 20662688183. The reversal of 20662688176 is 67188626602.

It is a super-2 number, since 2×20662688176² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 109141 + ... + 230731.

It is an arithmetic number, because the mean of its divisors is an integer number (580480208).

Almost surely, 2^20662688176 is an apocalyptic number.

20662688176 is a gapful number since it is divisible by the number (26) 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 20662688176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23219208320).

20662688176 is an abundant number, since it is smaller than the sum of its proper divisors (25775728464).

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

20662688176 is a wasteful number, since it uses less digits than its factorization.

20662688176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121674 (or 121668 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 20662688176 in words is "twenty billion, six hundred sixty-two million, six hundred eighty-eight thousand, one hundred seventy-six".