20520106974 has 40 divisors (see below), whose sum is σ = 47101724208. Its totient is φ = 6673203360.

The previous prime is 20520106973. The next prime is 20520106979. The reversal of 20520106974 is 47960102502.

20520106974 is a `hidden beast` number, since 2 + 0 + 520 + 1 + 0 + 69 + 74 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520106973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1538082 + ... + 1551365.

Almost surely, 2^20520106974 is an apocalyptic number.

20520106974 is an abundant number, since it is smaller than the sum of its proper divisors (26581617234).

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

20520106974 is a wasteful number, since it uses less digits than its factorization.

20520106974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089502 (or 3089493 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 20520106974 in words is "twenty billion, five hundred twenty million, one hundred six thousand, nine hundred seventy-four".