20859069 has 24 divisors (see below), whose sum is σ = 34941760. Its totient is φ = 10834560.

The previous prime is 20859031. The next prime is 20859071. The reversal of 20859069 is 96095802.

It is a happy number.

It is not a de Polignac number, because 20859069 - 2²³ = 12470461 is a prime.

It is a super-2 number, since 2×20859069² = 870201519093522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20859029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1564 + ... + 6645.

Almost surely, 2^20859069 is an apocalyptic number.

It is an amenable number.

20859069 is a deficient number, since it is larger than the sum of its proper divisors (14082691).

20859069 is a wasteful number, since it uses less digits than its factorization.

20859069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8241 (or 8230 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 20859069 is about 4567.1729767987. The cubic root of 20859069 is about 275.2738605170.

The spelling of 20859069 in words is "twenty million, eight hundred fifty-nine thousand, sixty-nine".