19749598594 has 16 divisors (see below), whose sum is σ = 32321765376. Its totient is φ = 8975912400.

The previous prime is 19749598549. The next prime is 19749598619. The reversal of 19749598594 is 49589594791.

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, 125404 + ... + 235000.

It is an arithmetic number, because the mean of its divisors is an integer number (2020110336).

Almost surely, 2^19749598594 is an apocalyptic number.

19749598594 is a deficient number, since it is larger than the sum of its proper divisors (12572166782).

19749598594 is a wasteful number, since it uses less digits than its factorization.

19749598594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117801.

The product of its digits is 146966400, while the sum is 70.

The spelling of 19749598594 in words is "nineteen billion, seven hundred forty-nine million, five hundred ninety-eight thousand, five hundred ninety-four".