20339493 has 8 divisors (see below), whose sum is σ = 27216288. Its totient is φ = 13511184.

The previous prime is 20339491. The next prime is 20339533. The reversal of 20339493 is 39493302.

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

It is not a de Polignac number, because 20339493 - 2¹ = 20339491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339491) 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, 11130 + ... + 12827.

It is an arithmetic number, because the mean of its divisors is an integer number (3402036).

Almost surely, 2^20339493 is an apocalyptic number.

It is an amenable number.

20339493 is a deficient number, since it is larger than the sum of its proper divisors (6876795).

20339493 is a wasteful number, since it uses less digits than its factorization.

20339493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24243.

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 20339493 is about 4509.9327045977. The cubic root of 20339493 is about 272.9690286753.

The spelling of 20339493 in words is "twenty million, three hundred thirty-nine thousand, four hundred ninety-three".