20716221316 has 24 divisors (see below), whose sum is σ = 41435541056. Its totient is φ = 8877716640.

The previous prime is 20716221307. The next prime is 20716221343. The reversal of 20716221316 is 61312261702.

It is a super-2 number, since 2×20716221316² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617035 + ... + 649741.

Almost surely, 2^20716221316 is an apocalyptic number.

It is an amenable number.

20716221316 is an abundant number, since it is smaller than the sum of its proper divisors (20719319740).

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

20716221316 is a wasteful number, since it uses less digits than its factorization.

20716221316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55339 (or 55337 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 20716221316 in words is "twenty billion, seven hundred sixteen million, two hundred twenty-one thousand, three hundred sixteen".