10199918 has 4 divisors (see below), whose sum is σ = 15299880. Its totient is φ = 5099958.

The previous prime is 10199911. The next prime is 10199923. The reversal of 10199918 is 81999101.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10199911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2549978 + ... + 2549981.

It is an arithmetic number, because the mean of its divisors is an integer number (3824970).

Almost surely, 2^10199918 is an apocalyptic number.

10199918 is a deficient number, since it is larger than the sum of its proper divisors (5099962).

10199918 is an equidigital number, since it uses as much as digits as its factorization.

10199918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5099961.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 10199918 is about 3193.7310469105. The cubic root of 10199918 is about 216.8697073678.

The spelling of 10199918 in words is "ten million, one hundred ninety-nine thousand, nine hundred eighteen".