631453312020 has 96 divisors (see below), whose sum is σ = 1793338202880. Its totient is φ = 165981957120.

The previous prime is 631453311989. The next prime is 631453312051. The reversal of 631453312020 is 20213354136.

It is an interprime number because it is at equal distance from previous prime (631453311989) and next prime (631453312051).

It is a super-2 number, since 2×631453312020² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26114496 + ... + 26138664.

It is an arithmetic number, because the mean of its divisors is an integer number (18680606280).

Almost surely, 2^631453312020 is an apocalyptic number.

631453312020 is a gapful number since it is divisible by the number (60) 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 631453312020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (896669101440).

631453312020 is an abundant number, since it is smaller than the sum of its proper divisors (1161884890860).

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

631453312020 is a wasteful number, since it uses less digits than its factorization.

631453312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30385 (or 30383 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 631453312020 its reverse (20213354136), we get a palindrome (651666666156).

The spelling of 631453312020 in words is "six hundred thirty-one billion, four hundred fifty-three million, three hundred twelve thousand, twenty".