20013698 has 4 divisors (see below), whose sum is σ = 30020550. Its totient is φ = 10006848.

The previous prime is 20013689. The next prime is 20013731. The reversal of 20013698 is 89631002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16834609 + 3179089 = 4103^2 + 1783^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20013698.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003423 + ... + 5003426.

Almost surely, 2^20013698 is an apocalyptic number.

20013698 is a deficient number, since it is larger than the sum of its proper divisors (10006852).

20013698 is a wasteful number, since it uses less digits than its factorization.

20013698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006851.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20013698 is about 4473.6671758190. The cubic root of 20013698 is about 271.5037176713.

The spelling of 20013698 in words is "twenty million, thirteen thousand, six hundred ninety-eight".