621334522020 has 96 divisors (see below), whose sum is σ = 1746837259776. Its totient is φ = 165014323200.

The previous prime is 621334522013. The next prime is 621334522033. The reversal of 621334522020 is 20225433126.

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

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, 14900400 + ... + 14942040.

It is an arithmetic number, because the mean of its divisors is an integer number (18196221456).

Almost surely, 2^621334522020 is an apocalyptic number.

621334522020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

621334522020 is an abundant number, since it is smaller than the sum of its proper divisors (1125502737756).

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

621334522020 is a wasteful number, since it uses less digits than its factorization.

621334522020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42661 (or 42659 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 621334522020 its reverse (20225433126), we get a palindrome (641559955146).

The spelling of 621334522020 in words is "six hundred twenty-one billion, three hundred thirty-four million, five hundred twenty-two thousand, twenty".