20339397 has 16 divisors (see below), whose sum is σ = 32450880. Its totient is φ = 12516336.

The previous prime is 20339393. The next prime is 20339401. The reversal of 20339397 is 79393302.

It is an interprime number because it is at equal distance from previous prime (20339393) and next prime (20339401).

It is not a de Polignac number, because 20339397 - 2² = 20339393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339393) 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, 28623 + ... + 29324.

It is an arithmetic number, because the mean of its divisors is an integer number (2028180).

Almost surely, 2^20339397 is an apocalyptic number.

20339397 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20339397 is a deficient number, since it is larger than the sum of its proper divisors (12111483).

20339397 is a wasteful number, since it uses less digits than its factorization.

20339397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57969 (or 57963 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 36.

The square root of 20339397 is about 4509.9220614108. The cubic root of 20339397 is about 272.9685992141.

It can be divided in two parts, 20339 and 397, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20339397 in words is "twenty million, three hundred thirty-nine thousand, three hundred ninety-seven".