21463682 has 4 divisors (see below), whose sum is σ = 32195526. Its totient is φ = 10731840.

The previous prime is 21463667. The next prime is 21463697. The reversal of 21463682 is 28636412.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21463667) and next prime (21463697).

It can be written as a sum of positive squares in only one way, i.e., 11909401 + 9554281 = 3451^2 + 3091^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5365919 + ... + 5365922.

Almost surely, 2^21463682 is an apocalyptic number.

21463682 is a deficient number, since it is larger than the sum of its proper divisors (10731844).

21463682 is a wasteful number, since it uses less digits than its factorization.

21463682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10731843.

The product of its digits is 13824, while the sum is 32.

The square root of 21463682 is about 4632.8913218421. The cubic root of 21463682 is about 277.9082301514.

The spelling of 21463682 in words is "twenty-one million, four hundred sixty-three thousand, six hundred eighty-two".