20873554188 has 24 divisors (see below), whose sum is σ = 48710571840. Its totient is φ = 6957049680.

The previous prime is 20873554187. The next prime is 20873554217. The reversal of 20873554188 is 88145537802.

It is a self number, because there is not a number n which added to its sum of digits gives 20873554188.

It is not an unprimeable number, because it can be changed into a prime (20873554187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13423 + ... + 204761.

It is an arithmetic number, because the mean of its divisors is an integer number (2029607160).

Almost surely, 2^20873554188 is an apocalyptic number.

It is an amenable number.

20873554188 is an abundant number, since it is smaller than the sum of its proper divisors (27837017652).

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

20873554188 is a wasteful number, since it uses less digits than its factorization.

20873554188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200437 (or 200435 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 20873554188 in words is "twenty billion, eight hundred seventy-three million, five hundred fifty-four thousand, one hundred eighty-eight".