19722117312 has 42 divisors (see below), whose sum is σ = 56529889988. Its totient is φ = 6574038912.

The previous prime is 19722117263. The next prime is 19722117341. The reversal of 19722117312 is 21371122791.

It is a super-2 number, since 2×19722117312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17119318 + ... + 17120469.

Almost surely, 2^19722117312 is an apocalyptic number.

19722117312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19722117312 is an abundant number, since it is smaller than the sum of its proper divisors (36807772676).

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

19722117312 is a wasteful number, since it uses less digits than its factorization.

19722117312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34239805 (or 34239792 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The spelling of 19722117312 in words is "nineteen billion, seven hundred twenty-two million, one hundred seventeen thousand, three hundred twelve".