20212022400 has 96 divisors (see below), whose sum is σ = 66573380400. Its totient is φ = 5389870080.

The previous prime is 20212022377. The next prime is 20212022417. The reversal of 20212022400 is 422021202.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20212022400.

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 11 ways as a sum of consecutive naturals, for example, 1043110 + ... + 1062309.

Almost surely, 2^20212022400 is an apocalyptic number.

20212022400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212022400 is an abundant number, since it is smaller than the sum of its proper divisors (46361358000).

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

20212022400 is a wasteful number, since it uses less digits than its factorization.

20212022400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105446 (or 2105429 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20212022400 its reverse (422021202), we get a palindrome (20634043602).

The spelling of 20212022400 in words is "twenty billion, two hundred twelve million, twenty-two thousand, four hundred".