20932663 has 4 divisors (see below), whose sum is σ = 20948760. Its totient is φ = 20916568.

The previous prime is 20932651. The next prime is 20932679. The reversal of 20932663 is 36623902.

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 20932663 - 2⁵ = 20932631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20932633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5908 + ... + 8761.

It is an arithmetic number, because the mean of its divisors is an integer number (5237190).

Almost surely, 2^20932663 is an apocalyptic number.

20932663 is a deficient number, since it is larger than the sum of its proper divisors (16097).

20932663 is a wasteful number, since it uses less digits than its factorization.

20932663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16096.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 20932663 is about 4575.2227268189. Note that the first 3 decimals coincide. The cubic root of 20932663 is about 275.5972166880.

The spelling of 20932663 in words is "twenty million, nine hundred thirty-two thousand, six hundred sixty-three".