20100998 has 8 divisors (see below), whose sum is σ = 30269592. Its totient is φ = 10011136.

The previous prime is 20100991. The next prime is 20101001. The reversal of 20100998 is 89900102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20100998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100991) 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 in 3 ways as a sum of consecutive naturals, for example, 19040 + ... + 20067.

It is an arithmetic number, because the mean of its divisors is an integer number (3783699).

Almost surely, 2^20100998 is an apocalyptic number.

20100998 is a deficient number, since it is larger than the sum of its proper divisors (10168594).

20100998 is a wasteful number, since it uses less digits than its factorization.

20100998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39366.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 20100998 is about 4483.4136547947. The cubic root of 20100998 is about 271.8979125975.

The spelling of 20100998 in words is "twenty million, one hundred thousand, nine hundred ninety-eight".