20097998 has 8 divisors (see below), whose sum is σ = 31457808. Its totient is φ = 9612064.

The previous prime is 20097997. The next prime is 20098007. The reversal of 20097998 is 89979002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20097997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218411 + ... + 218502.

It is an arithmetic number, because the mean of its divisors is an integer number (3932226).

Almost surely, 2^20097998 is an apocalyptic number.

20097998 is a deficient number, since it is larger than the sum of its proper divisors (11359810).

20097998 is a wasteful number, since it uses less digits than its factorization.

20097998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436938.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 20097998 is about 4483.0790758139. The cubic root of 20097998 is about 271.8843853368.

The spelling of 20097998 in words is "twenty million, ninety-seven thousand, nine hundred ninety-eight".