19900099 has 8 divisors (see below), whose sum is σ = 20477952. Its totient is φ = 19327560.

The previous prime is 19900057. The next prime is 19900123. The reversal of 19900099 is 99000991.

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

It is a cyclic number.

It is not a de Polignac number, because 19900099 - 2⁹ = 19899587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19900009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7002 + ... + 9424.

It is an arithmetic number, because the mean of its divisors is an integer number (2559744).

Almost surely, 2^19900099 is an apocalyptic number.

19900099 is a deficient number, since it is larger than the sum of its proper divisors (577853).

19900099 is a wasteful number, since it uses less digits than its factorization.

19900099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657.

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 19900099 is about 4460.9527009373. The cubic root of 19900099 is about 270.9890519944.

The spelling of 19900099 in words is "nineteen million, nine hundred thousand, ninety-nine".