21092159 has 8 divisors (see below), whose sum is σ = 23113728. Its totient is φ = 19087960.

The previous prime is 21092119. The next prime is 21092167. The reversal of 21092159 is 95129012.

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

It is a cyclic number.

It is not a de Polignac number, because 21092159 - 2²⁴ = 4314943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21092119) 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, 1727 + ... + 6720.

It is an arithmetic number, because the mean of its divisors is an integer number (2889216).

Almost surely, 2^21092159 is an apocalyptic number.

21092159 is a deficient number, since it is larger than the sum of its proper divisors (2021569).

21092159 is a wasteful number, since it uses less digits than its factorization.

21092159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8685.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 21092159 is about 4592.6200583109. The cubic root of 21092159 is about 276.2954155044.

The spelling of 21092159 in words is "twenty-one million, ninety-two thousand, one hundred fifty-nine".