20474698686 has 16 divisors (see below), whose sum is σ = 44099351184. Its totient is φ = 6299907264.

The previous prime is 20474698637. The next prime is 20474698687. The reversal of 20474698686 is 68689647402.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474698687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131247991 + ... + 131248146.

It is an arithmetic number, because the mean of its divisors is an integer number (2756209449).

Almost surely, 2^20474698686 is an apocalyptic number.

20474698686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20474698686 is an abundant number, since it is smaller than the sum of its proper divisors (23624652498).

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

20474698686 is a wasteful number, since it uses less digits than its factorization.

20474698686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262496155.

The product of its (nonzero) digits is 27869184, while the sum is 60.

The spelling of 20474698686 in words is "twenty billion, four hundred seventy-four million, six hundred ninety-eight thousand, six hundred eighty-six".