20859055 has 24 divisors (see below), whose sum is σ = 30656880. Its totient is φ = 13547520.

The previous prime is 20859031. The next prime is 20859071. The reversal of 20859055 is 55095802.

It is not a de Polignac number, because 20859055 - 2⁷ = 20858927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20859055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2415 + ... + 6895.

It is an arithmetic number, because the mean of its divisors is an integer number (1277370).

Almost surely, 2^20859055 is an apocalyptic number.

20859055 is a deficient number, since it is larger than the sum of its proper divisors (9797825).

20859055 is a wasteful number, since it uses less digits than its factorization.

20859055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519 (or 4512 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 20859055 is about 4567.1714441216. The cubic root of 20859055 is about 275.2737989318.

The spelling of 20859055 in words is "twenty million, eight hundred fifty-nine thousand, fifty-five".