20739369 has 16 divisors (see below), whose sum is σ = 31674368. Its totient is φ = 11824272.

The previous prime is 20739347. The next prime is 20739421. The reversal of 20739369 is 96393702.

It is not a de Polignac number, because 20739369 - 2²⁰ = 19690793 is a prime.

It is a super-2 number, since 2×20739369² = 860242853036322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20739769) 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 15 ways as a sum of consecutive naturals, for example, 11934 + ... + 13560.

It is an arithmetic number, because the mean of its divisors is an integer number (1979648).

Almost surely, 2^20739369 is an apocalyptic number.

It is an amenable number.

20739369 is a deficient number, since it is larger than the sum of its proper divisors (10934999).

20739369 is a wasteful number, since it uses less digits than its factorization.

20739369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 20739369 is about 4554.0497362238. The cubic root of 20739369 is about 274.7462960424.

The spelling of 20739369 in words is "twenty million, seven hundred thirty-nine thousand, three hundred sixty-nine".