20366838400 has 48 divisors (see below), whose sum is σ = 50312463390. Its totient is φ = 8146734080.

The previous prime is 20366838391. The next prime is 20366838403. The reversal of 20366838400 is 483866302.

It can be written as a sum of positive squares in 3 ways, for example, as 13929664576 + 6437173824 = 118024^2 + 80232^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (20366838403) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3179119 + ... + 3185518.

Almost surely, 2^20366838400 is an apocalyptic number.

20366838400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20366838400 is an abundant number, since it is smaller than the sum of its proper divisors (29945624990).

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

20366838400 is an equidigital number, since it uses as much as digits as its factorization.

20366838400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6364661 (or 6364644 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 20366838400 in words is "twenty billion, three hundred sixty-six million, eight hundred thirty-eight thousand, four hundred".