19993001 has 16 divisors (see below), whose sum is σ = 23709696. Its totient is φ = 16503696.

The previous prime is 19992991. The next prime is 19993007. The reversal of 19993001 is 10039991.

It is a cyclic number.

It is not a de Polignac number, because 19993001 - 2⁶ = 19992937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19993007) 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, 21590 + ... + 22496.

It is an arithmetic number, because the mean of its divisors is an integer number (1481856).

Almost surely, 2^19993001 is an apocalyptic number.

It is an amenable number.

19993001 is a deficient number, since it is larger than the sum of its proper divisors (3716695).

19993001 is an equidigital number, since it uses as much as digits as its factorization.

19993001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 19993001 is about 4471.3533745389. The cubic root of 19993001 is about 271.4100942837.

The spelling of 19993001 in words is "nineteen million, nine hundred ninety-three thousand, one".