19992007 has 4 divisors (see below), whose sum is σ = 22848016. Its totient is φ = 17136000.

The previous prime is 19992001. The next prime is 19992029. The reversal of 19992007 is 70029991.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19992007 - 2⁷ = 19991879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19992001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1427994 + ... + 1428007.

It is an arithmetic number, because the mean of its divisors is an integer number (5712004).

Almost surely, 2^19992007 is an apocalyptic number.

19992007 is a deficient number, since it is larger than the sum of its proper divisors (2856009).

19992007 is an equidigital number, since it uses as much as digits as its factorization.

19992007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856008.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 19992007 is about 4471.2422211283. The cubic root of 19992007 is about 271.4055962745.

The spelling of 19992007 in words is "nineteen million, nine hundred ninety-two thousand, seven".