16452013021 has 2 divisors, whose sum is σ = 16452013022. Its totient is φ = 16452013020.

The previous prime is 16452012977. The next prime is 16452013027. The reversal of 16452013021 is 12031025461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14402640121 + 2049372900 = 120011^2 + 45270^2 .

It is a cyclic number.

It is not a de Polignac number, because 16452013021 - 2²⁷ = 16317795293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16452013027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8226006510 + 8226006511.

It is an arithmetic number, because the mean of its divisors is an integer number (8226006511).

Almost surely, 2^16452013021 is an apocalyptic number.

It is an amenable number.

16452013021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16452013021 is an equidigital number, since it uses as much as digits as its factorization.

16452013021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 16452013021 its reverse (12031025461), we get a palindrome (28483038482).

The spelling of 16452013021 in words is "sixteen billion, four hundred fifty-two million, thirteen thousand, twenty-one".