21192098 has 16 divisors (see below), whose sum is σ = 34820280. Its totient is φ = 9628416.

The previous prime is 21192091. The next prime is 21192113. The reversal of 21192098 is 89029112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16752649 + 4439449 = 4093^2 + 2107^2 .

It is not an unprimeable number, because it can be changed into a prime (21192091) 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, 9761 + ... + 11732.

Almost surely, 2^21192098 is an apocalyptic number.

21192098 is a deficient number, since it is larger than the sum of its proper divisors (13628182).

21192098 is a wasteful number, since it uses less digits than its factorization.

21192098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21541.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 21192098 is about 4603.4875909467. The cubic root of 21192098 is about 276.7311096476.

The spelling of 21192098 in words is "twenty-one million, one hundred ninety-two thousand, ninety-eight".