21092030 has 8 divisors (see below), whose sum is σ = 37965672. Its totient is φ = 8436808.

The previous prime is 21092017. The next prime is 21092047. The reversal of 21092030 is 3029012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1054592 + ... + 1054611.

It is an arithmetic number, because the mean of its divisors is an integer number (4745709).

Almost surely, 2^21092030 is an apocalyptic number.

21092030 is a deficient number, since it is larger than the sum of its proper divisors (16873642).

21092030 is a wasteful number, since it uses less digits than its factorization.

21092030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109210.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 21092030 is about 4592.6060140186. The cubic root of 21092030 is about 276.2948522275.

The spelling of 21092030 in words is "twenty-one million, ninety-two thousand, thirty".