20859698 has 4 divisors (see below), whose sum is σ = 31289550. Its totient is φ = 10429848.

The previous prime is 20859691. The next prime is 20859719. The reversal of 20859698 is 89695802.

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., 20857489 + 2209 = 4567^2 + 47^2 .

It is not an unprimeable number, because it can be changed into a prime (20859691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5214923 + ... + 5214926.

Almost surely, 2^20859698 is an apocalyptic number.

20859698 is a deficient number, since it is larger than the sum of its proper divisors (10429852).

20859698 is a wasteful number, since it uses less digits than its factorization.

20859698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10429851.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 20859698 is about 4567.2418372580. The cubic root of 20859698 is about 275.2766274273.

The spelling of 20859698 in words is "twenty million, eight hundred fifty-nine thousand, six hundred ninety-eight".