20111331132 has 24 divisors (see below), whose sum is σ = 52140488400. Its totient is φ = 6703777008.

The previous prime is 20111331113. The next prime is 20111331181. The reversal of 20111331132 is 23113311102.

20111331132 is a `hidden beast` number, since 201 + 1 + 1 + 331 + 132 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93107907 + ... + 93108122.

It is an arithmetic number, because the mean of its divisors is an integer number (2172520350).

Almost surely, 2^20111331132 is an apocalyptic number.

It is an amenable number.

20111331132 is an abundant number, since it is smaller than the sum of its proper divisors (32029157268).

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

20111331132 is a wasteful number, since it uses less digits than its factorization.

20111331132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186216042 (or 186216034 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 20111331132 its reverse (23113311102), we get a palindrome (43224642234).

The spelling of 20111331132 in words is "twenty billion, one hundred eleven million, three hundred thirty-one thousand, one hundred thirty-two".