19293943923 has 12 divisors (see below), whose sum is σ = 27916514808. Its totient is φ = 12840713280.

The previous prime is 19293943871. The next prime is 19293943969. The reversal of 19293943923 is 32934939291.

It is a happy number.

It is not a de Polignac number, because 19293943923 - 2¹⁸ = 19293681779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19293943923.

It is not an unprimeable number, because it can be changed into a prime (19293943423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1820758 + ... + 1831323.

It is an arithmetic number, because the mean of its divisors is an integer number (2326376234).

Almost surely, 2^19293943923 is an apocalyptic number.

19293943923 is a deficient number, since it is larger than the sum of its proper divisors (8622570885).

19293943923 is a wasteful number, since it uses less digits than its factorization.

19293943923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652674 (or 3652671 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 54.

The spelling of 19293943923 in words is "nineteen billion, two hundred ninety-three million, nine hundred forty-three thousand, nine hundred twenty-three".