31453321020 has 96 divisors (see below), whose sum is σ = 97027047936. Its totient is φ = 7549536000.

The previous prime is 31453321013. The next prime is 31453321037. The reversal of 31453321020 is 2012335413.

It is a super-2 number, since 2×31453321020² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169264 + ... + 302583.

It is an arithmetic number, because the mean of its divisors is an integer number (1010698416).

Almost surely, 2^31453321020 is an apocalyptic number.

31453321020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31453321020 is an abundant number, since it is smaller than the sum of its proper divisors (65573726916).

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

31453321020 is a wasteful number, since it uses less digits than its factorization.

31453321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471971 (or 471969 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 31453321020 its reverse (2012335413), we get a palindrome (33465656433).

The spelling of 31453321020 in words is "thirty-one billion, four hundred fifty-three million, three hundred twenty-one thousand, twenty".