11820572730 has 64 divisors (see below), whose sum is σ = 31703857920. Its totient is φ = 3133919808.

The previous prime is 11820572723. The next prime is 11820572767. The reversal of 11820572730 is 3727502811.

11820572730 is a `hidden beast` number, since 1 + 1 + 82 + 0 + 572 + 7 + 3 + 0 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79822 + ... + 173241.

It is an arithmetic number, because the mean of its divisors is an integer number (495372780).

Almost surely, 2^11820572730 is an apocalyptic number.

11820572730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11820572730 is an abundant number, since it is smaller than the sum of its proper divisors (19883285190).

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

11820572730 is a wasteful number, since it uses less digits than its factorization.

11820572730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253252 (or 253246 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The spelling of 11820572730 in words is "eleven billion, eight hundred twenty million, five hundred seventy-two thousand, seven hundred thirty".