20859033 has 16 divisors (see below), whose sum is σ = 30985920. Its totient is φ = 12393024.

The previous prime is 20859031. The next prime is 20859071. The reversal of 20859033 is 33095802.

It is a happy number.

It is not a de Polignac number, because 20859033 - 2¹ = 20859031 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20859031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8091 + ... + 10352.

It is an arithmetic number, because the mean of its divisors is an integer number (1936620).

Almost surely, 2^20859033 is an apocalyptic number.

It is an amenable number.

20859033 is a deficient number, since it is larger than the sum of its proper divisors (10126887).

20859033 is a wasteful number, since it uses less digits than its factorization.

20859033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18488.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20859033 is about 4567.1690356281. The cubic root of 20859033 is about 275.2737021548.

The spelling of 20859033 in words is "twenty million, eight hundred fifty-nine thousand, thirty-three".