19927329426 has 16 divisors (see below), whose sum is σ = 44282954400. Its totient is φ = 6642443124.

The previous prime is 19927329413. The next prime is 19927329463. The reversal of 19927329426 is 62492372991.

19927329426 is a `hidden beast` number, since 199 + 2 + 7 + 3 + 29 + 426 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 369024619 = 19927329426 / (1 + 9 + 9 + 2 + 7 + 3 + 2 + 9 + 4 + 2 + 6).

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, 184512256 + ... + 184512363.

It is an arithmetic number, because the mean of its divisors is an integer number (2767684650).

Almost surely, 2^19927329426 is an apocalyptic number.

19927329426 is an abundant number, since it is smaller than the sum of its proper divisors (24355624974).

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

19927329426 is a wasteful number, since it uses less digits than its factorization.

19927329426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369024630 (or 369024624 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The spelling of 19927329426 in words is "nineteen billion, nine hundred twenty-seven million, three hundred twenty-nine thousand, four hundred twenty-six".