20490038912 has 32 divisors (see below), whose sum is σ = 46651429920. Its totient is φ = 8781444864.

The previous prime is 20490038867. The next prime is 20490038923. The reversal of 20490038912 is 21983009402.

It is a tau number, because it is divible by the number of its divisors (32).

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, 11433278 + ... + 11435069.

It is an arithmetic number, because the mean of its divisors is an integer number (1457857185).

Almost surely, 2^20490038912 is an apocalyptic number.

It is an amenable number.

20490038912 is an abundant number, since it is smaller than the sum of its proper divisors (26161391008).

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

20490038912 is an equidigital number, since it uses as much as digits as its factorization.

20490038912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22868368 (or 22868356 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 20490038912 in words is "twenty billion, four hundred ninety million, thirty-eight thousand, nine hundred twelve".