63031020 has 48 divisors (see below), whose sum is σ = 190065120. Its totient is φ = 15515136.

The previous prime is 63031013. The next prime is 63031021. The reversal of 63031020 is 2013036.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (63031021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39625 + ... + 41184.

It is an arithmetic number, because the mean of its divisors is an integer number (3959690).

Almost surely, 2^63031020 is an apocalyptic number.

63031020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63031020 is an abundant number, since it is smaller than the sum of its proper divisors (127034100).

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

63031020 is a wasteful number, since it uses less digits than its factorization.

63031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80834 (or 80832 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 63031020 is about 7939.2077690409. The cubic root of 63031020 is about 397.9710171398.

Adding to 63031020 its reverse (2013036), we get a palindrome (65044056).

The spelling of 63031020 in words is "sixty-three million, thirty-one thousand, twenty".