31232032020 has 144 divisors (see below), whose sum is σ = 108401704320. Its totient is φ = 7130135808.

The previous prime is 31232031991. The next prime is 31232032031. The reversal of 31232032020 is 2023023213.

It is a happy number.

31232032020 is a `hidden beast` number, since 3 + 1 + 2 + 320 + 320 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 31232031984 and 31232032002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1060251 + ... + 1089309.

Almost surely, 2^31232032020 is an apocalyptic number.

31232032020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31232032020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54200852160).

31232032020 is an abundant number, since it is smaller than the sum of its proper divisors (77169672300).

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

31232032020 is a wasteful number, since it uses less digits than its factorization.

31232032020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29934 (or 29929 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 31232032020 its reverse (2023023213), we get a palindrome (33255055233).

The spelling of 31232032020 in words is "thirty-one billion, two hundred thirty-two million, thirty-two thousand, twenty".