21098132 has 24 divisors (see below), whose sum is σ = 42399840. Its totient is φ = 9084960.

The previous prime is 21098111. The next prime is 21098141. The reversal of 21098132 is 23189012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11783 + ... + 13454.

It is an arithmetic number, because the mean of its divisors is an integer number (1766660).

Almost surely, 2^21098132 is an apocalyptic number.

21098132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21098132 is an abundant number, since it is smaller than the sum of its proper divisors (21301708).

21098132 is a wasteful number, since it uses less digits than its factorization.

21098132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25271 (or 25269 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 21098132 is about 4593.2702946811. The cubic root of 21098132 is about 276.3214940227.

The spelling of 21098132 in words is "twenty-one million, ninety-eight thousand, one hundred thirty-two".