19819023274 has 32 divisors (see below), whose sum is σ = 30725899776. Its totient is φ = 9582059760.

The previous prime is 19819023247. The next prime is 19819023277. The reversal of 19819023274 is 47232091891.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19819023277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5259339 + ... + 5263105.

It is an arithmetic number, because the mean of its divisors is an integer number (960184368).

Almost surely, 2^19819023274 is an apocalyptic number.

19819023274 is a deficient number, since it is larger than the sum of its proper divisors (10906876502).

19819023274 is a wasteful number, since it uses less digits than its factorization.

19819023274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 19819023274 in words is "nineteen billion, eight hundred nineteen million, twenty-three thousand, two hundred seventy-four".