19996023 has 16 divisors (see below), whose sum is σ = 27754496. Its totient is φ = 12791520.

The previous prime is 19996019. The next prime is 19996049. The reversal of 19996023 is 32069991.

It is a happy number.

It is not a de Polignac number, because 19996023 - 2² = 19996019 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 (19996003) 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, 10965 + ... + 12657.

It is an arithmetic number, because the mean of its divisors is an integer number (1734656).

Almost surely, 2^19996023 is an apocalyptic number.

19996023 is a deficient number, since it is larger than the sum of its proper divisors (7758473).

19996023 is a wasteful number, since it uses less digits than its factorization.

19996023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 19996023 is about 4471.6912907758. The cubic root of 19996023 is about 271.4237684020.

The spelling of 19996023 in words is "nineteen million, nine hundred ninety-six thousand, twenty-three".