19425669376 has 81 divisors (see below), whose sum is σ = 40209720789. Its totient is φ = 9366067200.

The previous prime is 19425669313. The next prime is 19425669421. The reversal of 19425669376 is 67396652491.

The square root of 19425669376 is 139376.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 13127659776 + 6298009600 = 114576^2 + 79360^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19425669376.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 69130356 + ... + 69130636.

Almost surely, 2^19425669376 is an apocalyptic number.

19425669376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19425669376 is the 139376-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19425669376

19425669376 is an abundant number, since it is smaller than the sum of its proper divisors (20784051413).

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

19425669376 is an frugal number, since it uses more digits than its factorization.

19425669376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 314 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 58.

The spelling of 19425669376 in words is "nineteen billion, four hundred twenty-five million, six hundred sixty-nine thousand, three hundred seventy-six".