19293993 has 12 divisors (see below), whose sum is σ = 27929200. Its totient is φ = 12834936.

The previous prime is 19293991. The next prime is 19294001. The reversal of 19293993 is 39939291.

It is not a de Polignac number, because 19293993 - 2¹ = 19293991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19293991) 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, 2658 + ... + 6756.

Almost surely, 2^19293993 is an apocalyptic number.

It is an amenable number.

19293993 is a deficient number, since it is larger than the sum of its proper divisors (8635207).

19293993 is a wasteful number, since it uses less digits than its factorization.

19293993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628 (or 4625 counting only the distinct ones).

The product of its digits is 118098, while the sum is 45.

The square root of 19293993 is about 4392.4928002218. The cubic root of 19293993 is about 268.2094273387.

The spelling of 19293993 in words is "nineteen million, two hundred ninety-three thousand, nine hundred ninety-three".