21363698 has 4 divisors (see below), whose sum is σ = 32045550. Its totient is φ = 10681848.

The previous prime is 21363659. The next prime is 21363703. The reversal of 21363698 is 89636312.

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

It can be written as a sum of positive squares in only one way, i.e., 10975969 + 10387729 = 3313^2 + 3223^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5340923 + ... + 5340926.

Almost surely, 2^21363698 is an apocalyptic number.

21363698 is a deficient number, since it is larger than the sum of its proper divisors (10681852).

21363698 is a wasteful number, since it uses less digits than its factorization.

21363698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10681851.

The product of its digits is 46656, while the sum is 38.

The square root of 21363698 is about 4622.0880562793. The cubic root of 21363698 is about 277.4760328839.

The spelling of 21363698 in words is "twenty-one million, three hundred sixty-three thousand, six hundred ninety-eight".