20624340420 has 48 divisors (see below), whose sum is σ = 64164616320. Its totient is φ = 5499823968.

The previous prime is 20624340383. The next prime is 20624340433. The reversal of 20624340420 is 2404342602.

20624340420 is a `hidden beast` number, since 2 + 0 + 624 + 34 + 0 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19096072 + ... + 19097151.

It is an arithmetic number, because the mean of its divisors is an integer number (1336762840).

Almost surely, 2^20624340420 is an apocalyptic number.

20624340420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20624340420 is an abundant number, since it is smaller than the sum of its proper divisors (43540275900).

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

20624340420 is a wasteful number, since it uses less digits than its factorization.

20624340420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38193241 (or 38193233 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The spelling of 20624340420 in words is "twenty billion, six hundred twenty-four million, three hundred forty thousand, four hundred twenty".