20684794746 has 64 divisors (see below), whose sum is σ = 53820205056. Its totient is φ = 5139076800.

The previous prime is 20684794681. The next prime is 20684794787. The reversal of 20684794746 is 64749748602.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 962685 + ... + 983936.

It is an arithmetic number, because the mean of its divisors is an integer number (840940704).

Almost surely, 2^20684794746 is an apocalyptic number.

20684794746 is an abundant number, since it is smaller than the sum of its proper divisors (33135410310).

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

20684794746 is a wasteful number, since it uses less digits than its factorization.

20684794746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946667.

The product of its (nonzero) digits is 16257024, while the sum is 57.

The spelling of 20684794746 in words is "twenty billion, six hundred eighty-four million, seven hundred ninety-four thousand, seven hundred forty-six".