20550959 has 16 divisors (see below), whose sum is σ = 24343200. Its totient is φ = 17103360.

The previous prime is 20550941. The next prime is 20550997. The reversal of 20550959 is 95905502.

It is a cyclic number.

It is not a de Polignac number, because 20550959 - 2²⁴ = 3773743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550659) 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, 19067 + ... + 20115.

It is an arithmetic number, because the mean of its divisors is an integer number (1521450).

Almost surely, 2^20550959 is an apocalyptic number.

20550959 is a deficient number, since it is larger than the sum of its proper divisors (3792241).

20550959 is a wasteful number, since it uses less digits than its factorization.

20550959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210.

The product of its (nonzero) digits is 20250, while the sum is 35.

The square root of 20550959 is about 4533.3165563415. The cubic root of 20550959 is about 273.9117720803.

The spelling of 20550959 in words is "twenty million, five hundred fifty thousand, nine hundred fifty-nine".