21246430 has 16 divisors (see below), whose sum is σ = 40493520. Its totient is φ = 7998592.

The previous prime is 21246419. The next prime is 21246443. The reversal of 21246430 is 3464212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62320 + ... + 62659.

It is an arithmetic number, because the mean of its divisors is an integer number (2530845).

Almost surely, 2^21246430 is an apocalyptic number.

21246430 is a deficient number, since it is larger than the sum of its proper divisors (19247090).

21246430 is a wasteful number, since it uses less digits than its factorization.

21246430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125003.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21246430 is about 4609.3849915146. The cubic root of 21246430 is about 276.9674009259.

The spelling of 21246430 in words is "twenty-one million, two hundred forty-six thousand, four hundred thirty".