21134753 has 2 divisors, whose sum is σ = 21134754. Its totient is φ = 21134752.

The previous prime is 21134749. The next prime is 21134761. The reversal of 21134753 is 35743112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16589329 + 4545424 = 4073^2 + 2132^2 .

It is a cyclic number.

It is not a de Polignac number, because 21134753 - 2² = 21134749 is a prime.

It is not a weakly prime, because it can be changed into another prime (21134713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10567376 + 10567377.

It is an arithmetic number, because the mean of its divisors is an integer number (10567377).

Almost surely, 2^21134753 is an apocalyptic number.

It is an amenable number.

21134753 is a deficient number, since it is larger than the sum of its proper divisors (1).

21134753 is an equidigital number, since it uses as much as digits as its factorization.

21134753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 21134753 is about 4597.2549418104. The cubic root of 21134753 is about 276.4812762616.

Adding to 21134753 its reverse (35743112), we get a palindrome (56877865).

The spelling of 21134753 in words is "twenty-one million, one hundred thirty-four thousand, seven hundred fifty-three".