20266620860 has 12 divisors (see below), whose sum is σ = 42559903848. Its totient is φ = 8106648336.

The previous prime is 20266620841. The next prime is 20266620863. The reversal of 20266620860 is 6802666202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266620863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506665502 + ... + 506665541.

It is an arithmetic number, because the mean of its divisors is an integer number (3546658654).

Almost surely, 2^20266620860 is an apocalyptic number.

20266620860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20266620860 is an abundant number, since it is smaller than the sum of its proper divisors (22293282988).

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

20266620860 is a wasteful number, since it uses less digits than its factorization.

20266620860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013331052 (or 1013331050 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 20266620860 in words is "twenty billion, two hundred sixty-six million, six hundred twenty thousand, eight hundred sixty".