20871650888 has 32 divisors (see below), whose sum is σ = 42732900000. Its totient is φ = 9478028160.

The previous prime is 20871650887. The next prime is 20871650897. The reversal of 20871650888 is 88805617802.

It is not an unprimeable number, because it can be changed into a prime (20871650887) 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, 20738 + ... + 205361.

It is an arithmetic number, because the mean of its divisors is an integer number (1335403125).

Almost surely, 2^20871650888 is an apocalyptic number.

It is an amenable number.

20871650888 is an abundant number, since it is smaller than the sum of its proper divisors (21861249112).

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

20871650888 is a wasteful number, since it uses less digits than its factorization.

20871650888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227165 (or 227161 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 53.

The spelling of 20871650888 in words is "twenty billion, eight hundred seventy-one million, six hundred fifty thousand, eight hundred eighty-eight".