20299898 has 4 divisors (see below), whose sum is σ = 30449850. Its totient is φ = 10149948.

The previous prime is 20299883. The next prime is 20299927. The reversal of 20299898 is 89899202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89899202 = 2 ⋅44949601.

It can be written as a sum of positive squares in only one way, i.e., 19333609 + 966289 = 4397^2 + 983^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5074973 + ... + 5074976.

Almost surely, 2^20299898 is an apocalyptic number.

20299898 is a deficient number, since it is larger than the sum of its proper divisors (10149952).

20299898 is a wasteful number, since it uses less digits than its factorization.

20299898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10149951.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 20299898 is about 4505.5408110459. The cubic root of 20299898 is about 272.7917835206.

The spelling of 20299898 in words is "twenty million, two hundred ninety-nine thousand, eight hundred ninety-eight".