20339765 has 8 divisors (see below), whose sum is σ = 24554880. Its totient is φ = 16173712.

The previous prime is 20339749. The next prime is 20339789. The reversal of 20339765 is 56793302.

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

It is a cyclic number.

It is not a de Polignac number, because 20339765 - 2⁴ = 20339749 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 11345 + ... + 13014.

It is an arithmetic number, because the mean of its divisors is an integer number (3069360).

Almost surely, 2^20339765 is an apocalyptic number.

It is an amenable number.

20339765 is a deficient number, since it is larger than the sum of its proper divisors (4215115).

20339765 is a wasteful number, since it uses less digits than its factorization.

20339765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24531.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 20339765 is about 4509.9628601575. The cubic root of 20339765 is about 272.9702454746.

The spelling of 20339765 in words is "twenty million, three hundred thirty-nine thousand, seven hundred sixty-five".