21230074 has 8 divisors (see below), whose sum is σ = 32367348. Its totient is φ = 10440960.

The previous prime is 21230047. The next prime is 21230123. The reversal of 21230074 is 47003212.

It can be written as a sum of positive squares in 2 ways, for example, as 21224449 + 5625 = 4607^2 + 75^2 .

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, 86887 + ... + 87130.

Almost surely, 2^21230074 is an apocalyptic number.

21230074 is a deficient number, since it is larger than the sum of its proper divisors (11137274).

21230074 is a wasteful number, since it uses less digits than its factorization.

21230074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174080.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 21230074 is about 4607.6104436031. The cubic root of 21230074 is about 276.8963106806.

Adding to 21230074 its reverse (47003212), we get a palindrome (68233286).

The spelling of 21230074 in words is "twenty-one million, two hundred thirty thousand, seventy-four".