19426836474 has 32 divisors (see below), whose sum is σ = 43253671680. Its totient is φ = 6463173600.

The previous prime is 19426836437. The next prime is 19426836523. The reversal of 19426836474 is 47463862491.

19426836474 is a `hidden beast` number, since 1 + 94 + 2 + 6 + 83 + 6 + 474 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 19426836474.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317122 + ... + 373389.

It is an arithmetic number, because the mean of its divisors is an integer number (1351677240).

Almost surely, 2^19426836474 is an apocalyptic number.

19426836474 is an abundant number, since it is smaller than the sum of its proper divisors (23826835206).

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

19426836474 is a wasteful number, since it uses less digits than its factorization.

19426836474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691043 (or 691037 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 19426836474 in words is "nineteen billion, four hundred twenty-six million, eight hundred thirty-six thousand, four hundred seventy-four".