20905116120 has 128 divisors (see below), whose sum is σ = 79638566400. Its totient is φ = 4778310528.

The previous prime is 20905116107. The next prime is 20905116131. The reversal of 20905116120 is 2161150902.

20905116120 is a `hidden beast` number, since 2 + 0 + 90 + 511 + 61 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1375054 + ... + 1390173.

It is an arithmetic number, because the mean of its divisors is an integer number (622176300).

Almost surely, 2^20905116120 is an apocalyptic number.

20905116120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20905116120 is an abundant number, since it is smaller than the sum of its proper divisors (58733450280).

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

20905116120 is a wasteful number, since it uses less digits than its factorization.

20905116120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765254 (or 2765244 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The spelling of 20905116120 in words is "twenty billion, nine hundred five million, one hundred sixteen thousand, one hundred twenty".