20220624640 has 36 divisors (see below), whose sum is σ = 48434718024. Its totient is φ = 8088249344.

The previous prime is 20220624617. The next prime is 20220624643. The reversal of 20220624640 is 4642602202.

It is a junction number, because it is equal to n+sod(n) for n = 20220624599 and 20220624608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220624643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7897402 + ... + 7899961.

It is an arithmetic number, because the mean of its divisors is an integer number (1345408834).

Almost surely, 2^20220624640 is an apocalyptic number.

20220624640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220624640 is an abundant number, since it is smaller than the sum of its proper divisors (28214093384).

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

20220624640 is an equidigital number, since it uses as much as digits as its factorization.

20220624640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15797384 (or 15797370 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The spelling of 20220624640 in words is "twenty billion, two hundred twenty million, six hundred twenty-four thousand, six hundred forty".