19872397346 has 16 divisors (see below), whose sum is σ = 30318710400. Its totient is φ = 9766214928.

The previous prime is 19872397339. The next prime is 19872397351. The reversal of 19872397346 is 64379327891.

It is a Harshad number since it is a multiple of its sum of digits (59).

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, 1125575 + ... + 1143093.

It is an arithmetic number, because the mean of its divisors is an integer number (1894919400).

Almost surely, 2^19872397346 is an apocalyptic number.

19872397346 is a deficient number, since it is larger than the sum of its proper divisors (10446313054).

19872397346 is a wasteful number, since it uses less digits than its factorization.

19872397346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27193.

The product of its digits is 13716864, while the sum is 59.

The spelling of 19872397346 in words is "nineteen billion, eight hundred seventy-two million, three hundred ninety-seven thousand, three hundred forty-six".