20001131200 has 84 divisors (see below), whose sum is σ = 51355172880. Its totient is φ = 7652592640.

The previous prime is 20001131197. The next prime is 20001131219. The reversal of 20001131200 is 213110002.

It is a super-2 number, since 2×20001131200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234955 + ... + 308554.

Almost surely, 2^20001131200 is an apocalyptic number.

20001131200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001131200 is an abundant number, since it is smaller than the sum of its proper divisors (31354041680).

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

20001131200 is a wasteful number, since it uses less digits than its factorization.

20001131200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543554 (or 543539 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20001131200 its reverse (213110002), we get a palindrome (20214241202).

The spelling of 20001131200 in words is "twenty billion, one million, one hundred thirty-one thousand, two hundred".