19923039 has 24 divisors (see below), whose sum is σ = 30476160. Its totient is φ = 12506832.

The previous prime is 19923023. The next prime is 19923041. The reversal of 19923039 is 93032991.

It is not a de Polignac number, because 19923039 - 2⁴ = 19923023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19922994 and 19923012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19923539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44752 + ... + 45194.

It is an arithmetic number, because the mean of its divisors is an integer number (1269840).

Almost surely, 2^19923039 is an apocalyptic number.

19923039 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19923039 is a deficient number, since it is larger than the sum of its proper divisors (10553121).

19923039 is a wasteful number, since it uses less digits than its factorization.

19923039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 19923039 is about 4463.5231600161. The cubic root of 19923039 is about 271.0931402819.

The spelling of 19923039 in words is "nineteen million, nine hundred twenty-three thousand, thirty-nine".