20389883 has 2 divisors, whose sum is σ = 20389884. Its totient is φ = 20389882.

The previous prime is 20389879. The next prime is 20389903. The reversal of 20389883 is 38898302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20389883 - 2² = 20389879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20389883.

It is not a weakly prime, because it can be changed into another prime (20389843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10194941 + 10194942.

It is an arithmetic number, because the mean of its divisors is an integer number (10194942).

Almost surely, 2^20389883 is an apocalyptic number.

20389883 is a deficient number, since it is larger than the sum of its proper divisors (1).

20389883 is an equidigital number, since it uses as much as digits as its factorization.

20389883 is an evil number, because the sum of its binary digits is even.

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

The square root of 20389883 is about 4515.5158066383. The cubic root of 20389883 is about 273.1942648033.

The spelling of 20389883 in words is "twenty million, three hundred eighty-nine thousand, eight hundred eighty-three".