20201722008 has 64 divisors (see below), whose sum is σ = 54410227200. Its totient is φ = 6213517440.

The previous prime is 20201721983. The next prime is 20201722061. The reversal of 20201722008 is 80022710202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905953 + ... + 927983.

It is an arithmetic number, because the mean of its divisors is an integer number (850159800).

Almost surely, 2^20201722008 is an apocalyptic number.

It is an amenable number.

20201722008 is an abundant number, since it is smaller than the sum of its proper divisors (34208505192).

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

20201722008 is a wasteful number, since it uses less digits than its factorization.

20201722008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24992 (or 24988 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The spelling of 20201722008 in words is "twenty billion, two hundred one million, seven hundred twenty-two thousand, eight".