20932339 has 4 divisors (see below), whose sum is σ = 21065824. Its totient is φ = 20798856.

The previous prime is 20932259. The next prime is 20932349. The reversal of 20932339 is 93323902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20932339 - 2¹⁹ = 20408051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20932339.

It is not an unprimeable number, because it can be changed into a prime (20932349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66507 + ... + 66820.

It is an arithmetic number, because the mean of its divisors is an integer number (5266456).

Almost surely, 2^20932339 is an apocalyptic number.

20932339 is a deficient number, since it is larger than the sum of its proper divisors (133485).

20932339 is a wasteful number, since it uses less digits than its factorization.

20932339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133484.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 20932339 is about 4575.1873185696. The cubic root of 20932339 is about 275.5957947641.

The spelling of 20932339 in words is "twenty million, nine hundred thirty-two thousand, three hundred thirty-nine".