20657349188 has 12 divisors (see below), whose sum is σ = 41314698432. Its totient is φ = 8853149640.

The previous prime is 20657349161. The next prime is 20657349241. The reversal of 20657349188 is 88194375602.

20657349188 is an admirable number.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368881208 + ... + 368881263.

It is an arithmetic number, because the mean of its divisors is an integer number (3442891536).

It is a 1-persistent number, because it is pandigital, but 2⋅20657349188 = 41314698376 is not.

Almost surely, 2^20657349188 is an apocalyptic number.

20657349188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20657349188 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20657349188 is a wasteful number, since it uses less digits than its factorization.

20657349188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737762482 (or 737762480 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 20657349188 in words is "twenty billion, six hundred fifty-seven million, three hundred forty-nine thousand, one hundred eighty-eight".