21099098 has 8 divisors (see below), whose sum is σ = 32030208. Its totient is φ = 10422364.

The previous prime is 21099097. The next prime is 21099103. The reversal of 21099098 is 89099012.

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 (21099097) 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, 63386 + ... + 63717.

It is an arithmetic number, because the mean of its divisors is an integer number (4003776).

Almost surely, 2^21099098 is an apocalyptic number.

21099098 is a deficient number, since it is larger than the sum of its proper divisors (10931110).

21099098 is a wasteful number, since it uses less digits than its factorization.

21099098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127188.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 21099098 is about 4593.3754473154. The cubic root of 21099098 is about 276.3257111810.

The spelling of 21099098 in words is "twenty-one million, ninety-nine thousand, ninety-eight".