19444097898 has 32 divisors (see below), whose sum is σ = 43215981120. Its totient is φ = 6480334800.

The previous prime is 19444097861. The next prime is 19444097899. The reversal of 19444097898 is 89879044491.

It is a happy number.

19444097898 is a `hidden beast` number, since 19 + 4 + 440 + 97 + 8 + 98 = 666.

It is not an unprimeable number, because it can be changed into a prime (19444097899) 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, 363048 + ... + 413148.

It is an arithmetic number, because the mean of its divisors is an integer number (1350499410).

Almost surely, 2^19444097898 is an apocalyptic number.

19444097898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19444097898 is an abundant number, since it is smaller than the sum of its proper divisors (23771883222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19444097898 is a wasteful number, since it uses less digits than its factorization.

19444097898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57299 (or 57293 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 19444097898 in words is "nineteen billion, four hundred forty-four million, ninety-seven thousand, eight hundred ninety-eight".