20605686474 has 16 divisors (see below), whose sum is σ = 41213030112. Its totient is φ = 6868285968.

The previous prime is 20605686469. The next prime is 20605686481. The reversal of 20605686474 is 47468650602.

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, 142417 + ... + 247979.

It is an arithmetic number, because the mean of its divisors is an integer number (2575814382).

Almost surely, 2^20605686474 is an apocalyptic number.

20605686474 is an abundant number, since it is smaller than the sum of its proper divisors (20607343638).

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

20605686474 is a wasteful number, since it uses less digits than its factorization.

20605686474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138101.

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 20605686474 in words is "twenty billion, six hundred five million, six hundred eighty-six thousand, four hundred seventy-four".