20776222460 has 72 divisors (see below), whose sum is σ = 52960068000. Its totient is φ = 6813561216.

The previous prime is 20776222459. The next prime is 20776222477. The reversal of 20776222460 is 6422267702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 438335 + ... + 483414.

It is an arithmetic number, because the mean of its divisors is an integer number (735556500).

Almost surely, 2^20776222460 is an apocalyptic number.

20776222460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20776222460 is an abundant number, since it is smaller than the sum of its proper divisors (32183845540).

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

20776222460 is a wasteful number, since it uses less digits than its factorization.

20776222460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921795 (or 921786 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 38.

The spelling of 20776222460 in words is "twenty billion, seven hundred seventy-six million, two hundred twenty-two thousand, four hundred sixty".