20426664600 has 72 divisors (see below), whose sum is σ = 68599554660. Its totient is φ = 5447110080.

The previous prime is 20426664593. The next prime is 20426664611. The reversal of 20426664600 is 646662402.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5672274 + ... + 5675873.

Almost surely, 2^20426664600 is an apocalyptic number.

20426664600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20426664600 is an abundant number, since it is smaller than the sum of its proper divisors (48172890060).

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

20426664600 is a wasteful number, since it uses less digits than its factorization.

20426664600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11348169 (or 11348157 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 20426664600 in words is "twenty billion, four hundred twenty-six million, six hundred sixty-four thousand, six hundred".