20439898 has 8 divisors (see below), whose sum is σ = 30941460. Its totient is φ = 10126080.

The previous prime is 20439871. The next prime is 20439911. The reversal of 20439898 is 89893402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19954089 + 485809 = 4467^2 + 697^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46663 + ... + 47098.

Almost surely, 2^20439898 is an apocalyptic number.

20439898 is a deficient number, since it is larger than the sum of its proper divisors (10501562).

20439898 is a wasteful number, since it uses less digits than its factorization.

20439898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93872.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 20439898 is about 4521.0505416330. The cubic root of 20439898 is about 273.4174580772.

The spelling of 20439898 in words is "twenty million, four hundred thirty-nine thousand, eight hundred ninety-eight".