20367221720 has 16 divisors (see below), whose sum is σ = 45826248960. Its totient is φ = 8146888672.

The previous prime is 20367221669. The next prime is 20367221731. The reversal of 20367221720 is 2712276302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254590232 + ... + 254590311.

It is an arithmetic number, because the mean of its divisors is an integer number (2864140560).

Almost surely, 2^20367221720 is an apocalyptic number.

20367221720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20367221720 is an abundant number, since it is smaller than the sum of its proper divisors (25459027240).

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

20367221720 is a wasteful number, since it uses less digits than its factorization.

20367221720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509180554 (or 509180550 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The spelling of 20367221720 in words is "twenty billion, three hundred sixty-seven million, two hundred twenty-one thousand, seven hundred twenty".