20407242164 has 12 divisors (see below), whose sum is σ = 35973351204. Its totient is φ = 10129141824.

The previous prime is 20407242143. The next prime is 20407242179. The reversal of 20407242164 is 46124270402.

It can be written as a sum of positive squares in 2 ways, for example, as 14251584400 + 6155657764 = 119380^2 + 78458^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20407242164.

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 3 ways as a sum of consecutive naturals, for example, 18619199 + ... + 18620294.

It is an arithmetic number, because the mean of its divisors is an integer number (2997779267).

Almost surely, 2^20407242164 is an apocalyptic number.

It is an amenable number.

20407242164 is a deficient number, since it is larger than the sum of its proper divisors (15566109040).

20407242164 is a wasteful number, since it uses less digits than its factorization.

20407242164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37239634 (or 37239632 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The spelling of 20407242164 in words is "twenty billion, four hundred seven million, two hundred forty-two thousand, one hundred sixty-four".