21092194 has 8 divisors (see below), whose sum is σ = 31711680. Its totient is φ = 10521636.

The previous prime is 21092171. The next prime is 21092207. The reversal of 21092194 is 49129012.

It is a happy number.

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

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, 11134 + ... + 12889.

It is an arithmetic number, because the mean of its divisors is an integer number (3963960).

Almost surely, 2^21092194 is an apocalyptic number.

21092194 is a deficient number, since it is larger than the sum of its proper divisors (10619486).

21092194 is a wasteful number, since it uses less digits than its factorization.

21092194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24464.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 21092194 is about 4592.6238687704. The cubic root of 21092194 is about 276.2955683311.

The spelling of 21092194 in words is "twenty-one million, ninety-two thousand, one hundred ninety-four".