19955393 has 16 divisors (see below), whose sum is σ = 21384000. Its totient is φ = 18591552.

The previous prime is 19955387. The next prime is 19955407. The reversal of 19955393 is 39355991.

It is not a de Polignac number, because 19955393 - 2⁸ = 19955137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19955303) 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, 183023 + ... + 183131.

It is an arithmetic number, because the mean of its divisors is an integer number (1336500).

Almost surely, 2^19955393 is an apocalyptic number.

It is an amenable number.

19955393 is a deficient number, since it is larger than the sum of its proper divisors (1428607).

19955393 is a wasteful number, since it uses less digits than its factorization.

19955393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its digits is 164025, while the sum is 44.

The square root of 19955393 is about 4467.1459568722. The cubic root of 19955393 is about 271.2398080649.

The spelling of 19955393 in words is "nineteen million, nine hundred fifty-five thousand, three hundred ninety-three".