16642453 has 2 divisors, whose sum is σ = 16642454. Its totient is φ = 16642452.

The previous prime is 16642429. The next prime is 16642469. The reversal of 16642453 is 35424661.

16642453 is nontrivially palindromic in base 7.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10771524 + 5870929 = 3282^2 + 2423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16642453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16642253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321226 + 8321227.

It is an arithmetic number, because the mean of its divisors is an integer number (8321227).

Almost surely, 2^16642453 is an apocalyptic number.

It is an amenable number.

16642453 is a deficient number, since it is larger than the sum of its proper divisors (1).

16642453 is an equidigital number, since it uses as much as digits as its factorization.

16642453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

The square root of 16642453 is about 4079.5162703438. The cubic root of 16642453 is about 255.3127164366.

The spelling of 16642453 in words is "sixteen million, six hundred forty-two thousand, four hundred fifty-three".