19722794405994 has 24 divisors (see below), whose sum is σ = 42732823954080. Its totient is φ = 6574248995688.

The previous prime is 19722794405939. The next prime is 19722794406037. The reversal of 19722794405994 is 49950449722791.

19722794405994 is a `hidden beast` number, since 1 + 9 + 7 + 2 + 27 + 9 + 4 + 4 + 0 + 599 + 4 = 666.

It is a super-2 number, since 2×19722794405994² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8259129 + ... + 10375875.

It is an arithmetic number, because the mean of its divisors is an integer number (1780534331420).

Almost surely, 2^{19722794405994} is an apocalyptic number.

19722794405994 is an abundant number, since it is smaller than the sum of its proper divisors (23010029548086).

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

19722794405994 is a wasteful number, since it uses less digits than its factorization.

19722794405994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634394 (or 2634391 counting only the distinct ones).

The product of its (nonzero) digits is 411505920, while the sum is 72.

The spelling of 19722794405994 in words is "nineteen trillion, seven hundred twenty-two billion, seven hundred ninety-four million, four hundred five thousand, nine hundred ninety-four".