20362989 has 4 divisors (see below), whose sum is σ = 27150656. Its totient is φ = 13575324.

The previous prime is 20362973. The next prime is 20362999. The reversal of 20362989 is 98926302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20362989 - 2⁴ = 20362973 is a prime.

It is a Duffinian number.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20362999) 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, 3393829 + ... + 3393834.

It is an arithmetic number, because the mean of its divisors is an integer number (6787664).

Almost surely, 2^20362989 is an apocalyptic number.

It is an amenable number.

20362989 is a deficient number, since it is larger than the sum of its proper divisors (6787667).

20362989 is an equidigital number, since it uses as much as digits as its factorization.

20362989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6787666.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 20362989 is about 4512.5368696555. The cubic root of 20362989 is about 273.0740986854.

The spelling of 20362989 in words is "twenty million, three hundred sixty-two thousand, nine hundred eighty-nine".