19992898 has 8 divisors (see below), whose sum is σ = 30155580. Its totient is φ = 9941040.

The previous prime is 19992881. The next prime is 19992899. The reversal of 19992898 is 89829991.

It can be written as a sum of positive squares in 2 ways, for example, as 19954089 + 38809 = 4467^2 + 197^2 .

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

It is not an unprimeable number, because it can be changed into a prime (19992899) 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, 27253 + ... + 27976.

Almost surely, 2^19992898 is an apocalyptic number.

19992898 is a deficient number, since it is larger than the sum of its proper divisors (10162682).

19992898 is a wasteful number, since it uses less digits than its factorization.

19992898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55412.

The product of its digits is 839808, while the sum is 55.

The square root of 19992898 is about 4471.3418567584. The cubic root of 19992898 is about 271.4096281991.

The spelling of 19992898 in words is "nineteen million, nine hundred ninety-two thousand, eight hundred ninety-eight".