21434753 has 2 divisors, whose sum is σ = 21434754. Its totient is φ = 21434752.

The previous prime is 21434747. The next prime is 21434767. The reversal of 21434753 is 35743412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19775809 + 1658944 = 4447^2 + 1288^2 .

It is a cyclic number.

It is not a de Polignac number, because 21434753 - 2²⁴ = 4657537 is a prime.

It is not a weakly prime, because it can be changed into another prime (21434723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10717376 + 10717377.

It is an arithmetic number, because the mean of its divisors is an integer number (10717377).

Almost surely, 2^21434753 is an apocalyptic number.

It is an amenable number.

21434753 is a deficient number, since it is larger than the sum of its proper divisors (1).

21434753 is an equidigital number, since it uses as much as digits as its factorization.

21434753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 29.

The square root of 21434753 is about 4629.7681367429. The cubic root of 21434753 is about 277.7833180347.

The spelling of 21434753 in words is "twenty-one million, four hundred thirty-four thousand, seven hundred fifty-three".