20007898 has 16 divisors (see below), whose sum is σ = 31139784. Its totient is φ = 9633600.

The previous prime is 20007881. The next prime is 20007919. The reversal of 20007898 is 89870002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19245769 + 762129 = 4387^2 + 873^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 6136 + ... + 8812.

Almost surely, 2^20007898 is an apocalyptic number.

20007898 is a deficient number, since it is larger than the sum of its proper divisors (11131886).

20007898 is a wasteful number, since it uses less digits than its factorization.

20007898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 20007898 is about 4473.0188910846. The cubic root of 20007898 is about 271.4774877411.

The spelling of 20007898 in words is "twenty million, seven thousand, eight hundred ninety-eight".