19998883 has 4 divisors (see below), whose sum is σ = 20010568. Its totient is φ = 19987200.

The previous prime is 19998877. The next prime is 19998899. The reversal of 19998883 is 38889991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19998883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19998383) 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, 2718 + ... + 6883.

It is an arithmetic number, because the mean of its divisors is an integer number (5002642).

Almost surely, 2^19998883 is an apocalyptic number.

19998883 is a deficient number, since it is larger than the sum of its proper divisors (11685).

19998883 is an equidigital number, since it uses as much as digits as its factorization.

19998883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11684.

The product of its digits is 1119744, while the sum is 55.

The square root of 19998883 is about 4472.0110688593. The cubic root of 19998883 is about 271.4367082246.

The spelling of 19998883 in words is "nineteen million, nine hundred ninety-eight thousand, eight hundred eighty-three".