21446753 has 2 divisors, whose sum is σ = 21446754. Its totient is φ = 21446752.

The previous prime is 21446749. The next prime is 21446779. The reversal of 21446753 is 35764412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18515809 + 2930944 = 4303^2 + 1712^2 .

It is a cyclic number.

It is not a de Polignac number, because 21446753 - 2² = 21446749 is a prime.

It is not a weakly prime, because it can be changed into another prime (21446783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10723376 + 10723377.

It is an arithmetic number, because the mean of its divisors is an integer number (10723377).

Almost surely, 2^21446753 is an apocalyptic number.

It is an amenable number.

21446753 is a deficient number, since it is larger than the sum of its proper divisors (1).

21446753 is an equidigital number, since it uses as much as digits as its factorization.

21446753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 21446753 is about 4631.0639166395. The cubic root of 21446753 is about 277.8351462962.

The spelling of 21446753 in words is "twenty-one million, four hundred forty-six thousand, seven hundred fifty-three".