20766277420 has 36 divisors (see below), whose sum is σ = 50729051520. Its totient is φ = 7119866208.

The previous prime is 20766277391. The next prime is 20766277429. The reversal of 20766277420 is 2477266702.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20766277429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10594060 + ... + 10596019.

It is an arithmetic number, because the mean of its divisors is an integer number (1409140320).

Almost surely, 2^20766277420 is an apocalyptic number.

20766277420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20766277420 is an abundant number, since it is smaller than the sum of its proper divisors (29962774100).

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

20766277420 is a wasteful number, since it uses less digits than its factorization.

20766277420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21190102 (or 21190093 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 43.

The spelling of 20766277420 in words is "twenty billion, seven hundred sixty-six million, two hundred seventy-seven thousand, four hundred twenty".