21046158 has 24 divisors (see below), whose sum is σ = 52114608. Its totient is φ = 6013152.

The previous prime is 21046147. The next prime is 21046169. The reversal of 21046158 is 85164012.

It is an interprime number because it is at equal distance from previous prime (21046147) and next prime (21046169).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83391 + ... + 83642.

It is an arithmetic number, because the mean of its divisors is an integer number (2171442).

Almost surely, 2^21046158 is an apocalyptic number.

21046158 is an abundant number, since it is smaller than the sum of its proper divisors (31068450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21046158 is a wasteful number, since it uses less digits than its factorization.

21046158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167048 (or 167045 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 21046158 is about 4587.6091812621. The cubic root of 21046158 is about 276.0944068975.

The spelling of 21046158 in words is "twenty-one million, forty-six thousand, one hundred fifty-eight".