21363722 has 8 divisors (see below), whose sum is σ = 32363172. Its totient is φ = 10576000.

The previous prime is 21363703. The next prime is 21363739. The reversal of 21363722 is 22736312.

It can be written as a sum of positive squares in 2 ways, for example, as 21335161 + 28561 = 4619^2 + 169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21363691 and 21363700.

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, 52679 + ... + 53082.

Almost surely, 2^21363722 is an apocalyptic number.

21363722 is a deficient number, since it is larger than the sum of its proper divisors (10999450).

21363722 is a wasteful number, since it uses less digits than its factorization.

21363722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105864.

The product of its digits is 3024, while the sum is 26.

The square root of 21363722 is about 4622.0906525078. The cubic root of 21363722 is about 277.4761367895.

The spelling of 21363722 in words is "twenty-one million, three hundred sixty-three thousand, seven hundred twenty-two".