11820420400 has 60 divisors (see below), whose sum is σ = 28934433792. Its totient is φ = 4638949120.

The previous prime is 11820420379. The next prime is 11820420407. The reversal of 11820420400 is 402402811.

It is not an unprimeable number, because it can be changed into a prime (11820420407) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 257584 + ... + 299983.

Almost surely, 2^11820420400 is an apocalyptic number.

11820420400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11820420400 is an abundant number, since it is smaller than the sum of its proper divisors (17114013392).

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

11820420400 is a wasteful number, since it uses less digits than its factorization.

11820420400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557638 (or 557627 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The spelling of 11820420400 in words is "eleven billion, eight hundred twenty million, four hundred twenty thousand, four hundred".