19880899 has 4 divisors (see below), whose sum is σ = 19894336. Its totient is φ = 19867464.

The previous prime is 19880879. The next prime is 19880911. The reversal of 19880899 is 99808891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19880899 - 2⁵ = 19880867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19880879) 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, 4179 + ... + 7564.

It is an arithmetic number, because the mean of its divisors is an integer number (4973584).

Almost surely, 2^19880899 is an apocalyptic number.

19880899 is a deficient number, since it is larger than the sum of its proper divisors (13437).

19880899 is a wasteful number, since it uses less digits than its factorization.

19880899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436.

The product of its (nonzero) digits is 373248, while the sum is 52.

The square root of 19880899 is about 4458.8001749350. The cubic root of 19880899 is about 270.9018721264.

The spelling of 19880899 in words is "nineteen million, eight hundred eighty thousand, eight hundred ninety-nine".