21455098 has 8 divisors (see below), whose sum is σ = 36780192. Its totient is φ = 9195036.

The previous prime is 21455087. The next prime is 21455101. The reversal of 21455098 is 89055412.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766240 + ... + 766267.

It is an arithmetic number, because the mean of its divisors is an integer number (4597524).

Almost surely, 2^21455098 is an apocalyptic number.

21455098 is a deficient number, since it is larger than the sum of its proper divisors (15325094).

21455098 is a wasteful number, since it uses less digits than its factorization.

21455098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532516.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 21455098 is about 4631.9648098836. The cubic root of 21455098 is about 277.8711771373.

The spelling of 21455098 in words is "twenty-one million, four hundred fifty-five thousand, ninety-eight".