20620692680 has 64 divisors (see below), whose sum is σ = 53175104640. Its totient is φ = 7049889792.

The previous prime is 20620692641. The next prime is 20620692689. The reversal of 20620692680 is 8629602602.

It is not an unprimeable number, because it can be changed into a prime (20620692689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5474 + ... + 203153.

It is an arithmetic number, because the mean of its divisors is an integer number (830861010).

Almost surely, 2^20620692680 is an apocalyptic number.

20620692680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20620692680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26587552320).

20620692680 is an abundant number, since it is smaller than the sum of its proper divisors (32554411960).

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

20620692680 is a wasteful number, since it uses less digits than its factorization.

20620692680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208998 (or 208994 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 20620692680 in words is "twenty billion, six hundred twenty million, six hundred ninety-two thousand, six hundred eighty".