20023919 has 8 divisors (see below), whose sum is σ = 20651328. Its totient is φ = 19401120.

The previous prime is 20023907. The next prime is 20023931. The reversal of 20023919 is 91932002.

It is an interprime number because it is at equal distance from previous prime (20023907) and next prime (20023931).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20023919 - 2⁴ = 20023903 is a prime.

It is a super-2 number, since 2×20023919² = 801914664237122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9029 + ... + 11025.

It is an arithmetic number, because the mean of its divisors is an integer number (2581416).

Almost surely, 2^20023919 is an apocalyptic number.

20023919 is a deficient number, since it is larger than the sum of its proper divisors (627409).

20023919 is a wasteful number, since it uses less digits than its factorization.

20023919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 20023919 is about 4474.8093814150. The cubic root of 20023919 is about 271.5499288084.

The spelling of 20023919 in words is "twenty million, twenty-three thousand, nine hundred nineteen".