20213031132 has 72 divisors (see below), whose sum is σ = 59382960000. Its totient is φ = 5677263648.

The previous prime is 20213031071. The next prime is 20213031133. The reversal of 20213031132 is 23113031202.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213031133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 664882 + ... + 694617.

Almost surely, 2^20213031132 is an apocalyptic number.

It is an amenable number.

20213031132 is an abundant number, since it is smaller than the sum of its proper divisors (39169928868).

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

20213031132 is a wasteful number, since it uses less digits than its factorization.

20213031132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359575 (or 1359570 counting only the distinct ones).

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

Adding to 20213031132 its reverse (23113031202), we get a palindrome (43326062334).

The spelling of 20213031132 in words is "twenty billion, two hundred thirteen million, thirty-one thousand, one hundred thirty-two".