20019339 has 8 divisors (see below), whose sum is σ = 29658320. Its totient is φ = 13346208.

The previous prime is 20019313. The next prime is 20019341. The reversal of 20019339 is 93391002.

It is a de Polignac number, because none of the positive numbers 2^k-20019339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 741457 = 20019339 / (2 + 0 + 0 + 1 + 9 + 3 + 3 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20039339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370702 + ... + 370755.

It is an arithmetic number, because the mean of its divisors is an integer number (3707290).

Almost surely, 2^20019339 is an apocalyptic number.

20019339 is a deficient number, since it is larger than the sum of its proper divisors (9638981).

20019339 is an equidigital number, since it uses as much as digits as its factorization.

20019339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741466 (or 741460 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 20019339 is about 4474.2975985064. The cubic root of 20019339 is about 271.5292236789.

The spelling of 20019339 in words is "twenty million, nineteen thousand, three hundred thirty-nine".