20901198020 has 24 divisors (see below), whose sum is σ = 45800887104. Its totient is φ = 7996979936.

The previous prime is 20901197981. The next prime is 20901198037. The reversal of 20901198020 is 2089110902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22718234 + ... + 22719153.

It is an arithmetic number, because the mean of its divisors is an integer number (1908370296).

Almost surely, 2^20901198020 is an apocalyptic number.

20901198020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20901198020 is an abundant number, since it is smaller than the sum of its proper divisors (24899689084).

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

20901198020 is a wasteful number, since it uses less digits than its factorization.

20901198020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45437419 (or 45437417 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 20901198020 in words is "twenty billion, nine hundred one million, one hundred ninety-eight thousand, twenty".