20732889 has 4 divisors (see below), whose sum is σ = 27643856. Its totient is φ = 13821924.

The previous prime is 20732879. The next prime is 20732891. The reversal of 20732889 is 98823702.

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 20732889 - 2⁹ = 20732377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20732849) 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, 3455479 + ... + 3455484.

It is an arithmetic number, because the mean of its divisors is an integer number (6910964).

Almost surely, 2^20732889 is an apocalyptic number.

It is an amenable number.

20732889 is a deficient number, since it is larger than the sum of its proper divisors (6910967).

20732889 is an equidigital number, since it uses as much as digits as its factorization.

20732889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6910966.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 20732889 is about 4553.3382259613. The cubic root of 20732889 is about 274.7176783049.

The spelling of 20732889 in words is "twenty million, seven hundred thirty-two thousand, eight hundred eighty-nine".