20700818 has 8 divisors (see below), whose sum is σ = 31808700. Its totient is φ = 10097920.

The previous prime is 20700817. The next prime is 20700833. The reversal of 20700818 is 81800702.

It can be written as a sum of positive squares in 2 ways, for example, as 16752649 + 3948169 = 4093^2 + 1987^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20700817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126143 + ... + 126306.

Almost surely, 2^20700818 is an apocalyptic number.

20700818 is a deficient number, since it is larger than the sum of its proper divisors (11107882).

20700818 is a wasteful number, since it uses less digits than its factorization.

20700818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252492.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 20700818 is about 4549.8151610807. The cubic root of 20700818 is about 274.5759547300.

The spelling of 20700818 in words is "twenty million, seven hundred thousand, eight hundred eighteen".