20332621 has 8 divisors (see below), whose sum is σ = 21901824. Its totient is φ = 18820560.

The previous prime is 20332607. The next prime is 20332633. The reversal of 20332621 is 12623302.

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 20332621 - 2⁵ = 20332589 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 (20332651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13546 + ... + 14971.

It is an arithmetic number, because the mean of its divisors is an integer number (2737728).

Almost surely, 2^20332621 is an apocalyptic number.

It is an amenable number.

20332621 is a deficient number, since it is larger than the sum of its proper divisors (1569203).

20332621 is a wasteful number, since it uses less digits than its factorization.

20332621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28571.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20332621 is about 4509.1707663383. The cubic root of 20332621 is about 272.9382829980.

Adding to 20332621 its reverse (12623302), we get a palindrome (32955923).

The spelling of 20332621 in words is "twenty million, three hundred thirty-two thousand, six hundred twenty-one".