21875098 has 16 divisors (see below), whose sum is σ = 38061504. Its totient is φ = 9234720.

The previous prime is 21875083. The next prime is 21875123. The reversal of 21875098 is 89057812.

It is a self number, because there is not a number n which added to its sum of digits gives 21875098.

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 7 ways as a sum of consecutive naturals, for example, 10723 + ... + 12598.

It is an arithmetic number, because the mean of its divisors is an integer number (2378844).

Almost surely, 2^21875098 is an apocalyptic number.

21875098 is a deficient number, since it is larger than the sum of its proper divisors (16186406).

21875098 is a wasteful number, since it uses less digits than its factorization.

21875098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23397.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 21875098 is about 4677.0822100964. The cubic root of 21875098 is about 279.6726531636.

The spelling of 21875098 in words is "twenty-one million, eight hundred seventy-five thousand, ninety-eight".