19800898 has 32 divisors (see below), whose sum is σ = 33264000. Its totient is φ = 8781696.

The previous prime is 19800871. The next prime is 19800899. The reversal of 19800898 is 89800891.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (19800899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99403 + ... + 99601.

It is an arithmetic number, because the mean of its divisors is an integer number (1039500).

Almost surely, 2^19800898 is an apocalyptic number.

19800898 is a deficient number, since it is larger than the sum of its proper divisors (13463102).

19800898 is a wasteful number, since it uses less digits than its factorization.

19800898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346.

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 19800898 is about 4449.8199963594. The cubic root of 19800898 is about 270.5380127276.

The spelling of 19800898 in words is "nineteen million, eight hundred thousand, eight hundred ninety-eight".