20474698678 has 32 divisors (see below), whose sum is σ = 35691429888. Its totient is φ = 8627018400.

The previous prime is 20474698637. The next prime is 20474698687. The reversal of 20474698678 is 87689647402.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2495563 + ... + 2503753.

It is an arithmetic number, because the mean of its divisors is an integer number (1115357184).

Almost surely, 2^20474698678 is an apocalyptic number.

20474698678 is a deficient number, since it is larger than the sum of its proper divisors (15216731210).

20474698678 is a wasteful number, since it uses less digits than its factorization.

20474698678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11188.

The product of its (nonzero) digits is 32514048, while the sum is 61.

The spelling of 20474698678 in words is "twenty billion, four hundred seventy-four million, six hundred ninety-eight thousand, six hundred seventy-eight".