20006440620 has 24 divisors (see below), whose sum is σ = 56018033904. Its totient is φ = 5335050816.

The previous prime is 20006440609. The next prime is 20006440661. The reversal of 20006440620 is 2604460002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166720279 + ... + 166720398.

It is an arithmetic number, because the mean of its divisors is an integer number (2334084746).

Almost surely, 2^20006440620 is an apocalyptic number.

20006440620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20006440620 is an abundant number, since it is smaller than the sum of its proper divisors (36011593284).

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

20006440620 is a wasteful number, since it uses less digits than its factorization.

20006440620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333440689 (or 333440687 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The spelling of 20006440620 in words is "twenty billion, six million, four hundred forty thousand, six hundred twenty".