20201131332 has 18 divisors (see below), whose sum is σ = 51063970958. Its totient is φ = 6733710432.

The previous prime is 20201131309. The next prime is 20201131337. The reversal of 20201131332 is 23313110202.

20201131332 is a `hidden beast` number, since 2 + 0 + 201 + 131 + 332 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20193546816 + 7584516 = 142104^2 + 2754^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (20201131337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280571233 + ... + 280571304.

Almost surely, 2^20201131332 is an apocalyptic number.

It is an amenable number.

20201131332 is an abundant number, since it is smaller than the sum of its proper divisors (30862839626).

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

20201131332 is a wasteful number, since it uses less digits than its factorization.

20201131332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561142547 (or 561142542 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20201131332 its reverse (23313110202), we get a palindrome (43514241534).

The spelling of 20201131332 in words is "twenty billion, two hundred one million, one hundred thirty-one thousand, three hundred thirty-two".