20329965 has 24 divisors (see below), whose sum is σ = 35363328. Its totient is φ = 10804320.

The previous prime is 20329951. The next prime is 20329979. The reversal of 20329965 is 56992302.

It is an interprime number because it is at equal distance from previous prime (20329951) and next prime (20329979).

It is not a de Polignac number, because 20329965 - 2⁶ = 20329901 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15900 + ... + 17130.

It is an arithmetic number, because the mean of its divisors is an integer number (1473472).

Almost surely, 2^20329965 is an apocalyptic number.

It is an amenable number.

20329965 is a deficient number, since it is larger than the sum of its proper divisors (15033363).

20329965 is a wasteful number, since it uses less digits than its factorization.

20329965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 20329965 is about 4508.8762458067. The cubic root of 20329965 is about 272.9263980628.

The spelling of 20329965 in words is "twenty million, three hundred twenty-nine thousand, nine hundred sixty-five".