19399953 has 16 divisors (see below), whose sum is σ = 26429760. Its totient is φ = 12655104.

The previous prime is 19399937. The next prime is 19399993. The reversal of 19399953 is 35999391.

It is a happy number.

It is not a de Polignac number, because 19399953 - 2⁴ = 19399937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19399993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29850 + ... + 30492.

It is an arithmetic number, because the mean of its divisors is an integer number (1651860).

Almost surely, 2^19399953 is an apocalyptic number.

It is an amenable number.

19399953 is a deficient number, since it is larger than the sum of its proper divisors (7029807).

19399953 is a wasteful number, since it uses less digits than its factorization.

19399953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its digits is 295245, while the sum is 48.

The square root of 19399953 is about 4404.5377737057. The cubic root of 19399953 is about 268.6995212205.

The spelling of 19399953 in words is "nineteen million, three hundred ninety-nine thousand, nine hundred fifty-three".