20627816860 has 24 divisors (see below), whose sum is σ = 49506760800. Its totient is φ = 7072394304.

The previous prime is 20627816827. The next prime is 20627816861. The reversal of 20627816860 is 6861872602.

It is a self number, because there is not a number n which added to its sum of digits gives 20627816860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20627816861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73670635 + ... + 73670914.

It is an arithmetic number, because the mean of its divisors is an integer number (2062781700).

Almost surely, 2^20627816860 is an apocalyptic number.

20627816860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20627816860 is an abundant number, since it is smaller than the sum of its proper divisors (28878943940).

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

20627816860 is a wasteful number, since it uses less digits than its factorization.

20627816860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147341565 (or 147341563 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 20627816860 in words is "twenty billion, six hundred twenty-seven million, eight hundred sixteen thousand, eight hundred sixty".