19993995 has 24 divisors (see below), whose sum is σ = 39607776. Its totient is φ = 9139968.

The previous prime is 19993951. The next prime is 19993997. The reversal of 19993995 is 59939991.

It is a happy number.

It is not a de Polignac number, because 19993995 - 2¹⁰ = 19992971 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (19993997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31422 + ... + 32051.

It is an arithmetic number, because the mean of its divisors is an integer number (1650324).

Almost surely, 2^19993995 is an apocalyptic number.

19993995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19993995 is a deficient number, since it is larger than the sum of its proper divisors (19613781).

19993995 is a wasteful number, since it uses less digits than its factorization.

19993995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63491 (or 63488 counting only the distinct ones).

The product of its digits is 885735, while the sum is 54.

The square root of 19993995 is about 4471.4645251864. The cubic root of 19993995 is about 271.4145921438.

The spelling of 19993995 in words is "nineteen million, nine hundred ninety-three thousand, nine hundred ninety-five".