20700559 has 6 divisors (see below), whose sum is σ = 22753640. Its totient is φ = 18818580.

The previous prime is 20700553. The next prime is 20700593. The reversal of 20700559 is 95500702.

It is not a de Polignac number, because 20700559 - 2³ = 20700551 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 (20700551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85419 + ... + 85660.

Almost surely, 2^20700559 is an apocalyptic number.

20700559 is a deficient number, since it is larger than the sum of its proper divisors (2053081).

20700559 is a wasteful number, since it uses less digits than its factorization.

20700559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171101 (or 171090 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 20700559 is about 4549.7866982970. The cubic root of 20700559 is about 274.5748095987.

The spelling of 20700559 in words is "twenty million, seven hundred thousand, five hundred fifty-nine".