19993396 has 12 divisors (see below), whose sum is σ = 36830080. Its totient is φ = 9470520.

The previous prime is 19993381. The next prime is 19993447. The reversal of 19993396 is 69339991.

It is a happy number.

It is a super-2 number, since 2×19993396² = 799471767225632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131460 + ... + 131611.

Almost surely, 2^19993396 is an apocalyptic number.

It is an amenable number.

19993396 is a deficient number, since it is larger than the sum of its proper divisors (16836684).

19993396 is a wasteful number, since it uses less digits than its factorization.

19993396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263094 (or 263092 counting only the distinct ones).

The product of its digits is 354294, while the sum is 49.

The square root of 19993396 is about 4471.3975443926. The cubic root of 19993396 is about 271.4118816806.

The spelling of 19993396 in words is "nineteen million, nine hundred ninety-three thousand, three hundred ninety-six".