20383889 has 4 divisors (see below), whose sum is σ = 20399424. Its totient is φ = 20368356.

The previous prime is 20383877. The next prime is 20383907. The reversal of 20383889 is 98838302.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98838302 = 2 ⋅49419151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20383889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20380889) 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, 5597 + ... + 8490.

It is an arithmetic number, because the mean of its divisors is an integer number (5099856).

Almost surely, 2^20383889 is an apocalyptic number.

It is an amenable number.

20383889 is a deficient number, since it is larger than the sum of its proper divisors (15535).

20383889 is a wasteful number, since it uses less digits than its factorization.

20383889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15534.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 20383889 is about 4514.8520463023. The cubic root of 20383889 is about 273.1674919358.

The spelling of 20383889 in words is "twenty million, three hundred eighty-three thousand, eight hundred eighty-nine".