20918059 has 8 divisors (see below), whose sum is σ = 21349328. Its totient is φ = 20489760.

The previous prime is 20918047. The next prime is 20918071. The reversal of 20918059 is 95081902.

It is an interprime number because it is at equal distance from previous prime (20918047) and next prime (20918071).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20918059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20918039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18169 + ... + 19285.

It is an arithmetic number, because the mean of its divisors is an integer number (2668666).

Almost surely, 2^20918059 is an apocalyptic number.

20918059 is a deficient number, since it is larger than the sum of its proper divisors (431269).

20918059 is a wasteful number, since it uses less digits than its factorization.

20918059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 20918059 is about 4573.6264604797. The cubic root of 20918059 is about 275.5331102066.

The spelling of 20918059 in words is "twenty million, nine hundred eighteen thousand, fifty-nine".