21027092 has 6 divisors (see below), whose sum is σ = 36797418. Its totient is φ = 10513544.

The previous prime is 21027077. The next prime is 21027103. The reversal of 21027092 is 29072012.

It can be written as a sum of positive squares in only one way, i.e., 15476356 + 5550736 = 3934^2 + 2356^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628383 + ... + 2628390.

It is an arithmetic number, because the mean of its divisors is an integer number (6132903).

Almost surely, 2^21027092 is an apocalyptic number.

It is an amenable number.

21027092 is a deficient number, since it is larger than the sum of its proper divisors (15770326).

21027092 is a wasteful number, since it uses less digits than its factorization.

21027092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256777 (or 5256775 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 21027092 is about 4585.5307217377. The cubic root of 21027092 is about 276.0110091527.

The spelling of 21027092 in words is "twenty-one million, twenty-seven thousand, ninety-two".