20133889 has 2 divisors, whose sum is σ = 20133890. Its totient is φ = 20133888.

The previous prime is 20133881. The next prime is 20133937. The reversal of 20133889 is 98833102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 1575025 = 4308^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 20133889 - 2³ = 20133881 is a prime.

It is not a weakly prime, because it can be changed into another prime (20133881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066944 + 10066945.

It is an arithmetic number, because the mean of its divisors is an integer number (10066945).

Almost surely, 2^20133889 is an apocalyptic number.

It is an amenable number.

20133889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20133889 is an equidigital number, since it uses as much as digits as its factorization.

20133889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 20133889 is about 4487.0802310634. The cubic root of 20133889 is about 272.0461327821.

The spelling of 20133889 in words is "twenty million, one hundred thirty-three thousand, eight hundred eighty-nine".