21828286453 has 2 divisors, whose sum is σ = 21828286454. Its totient is φ = 21828286452.

The previous prime is 21828286409. The next prime is 21828286499. The reversal of 21828286453 is 35468282812.

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., 11784839364 + 10043447089 = 108558^2 + 100217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21828286453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21828286397 and 21828286406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21828286853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10914143226 + 10914143227.

It is an arithmetic number, because the mean of its divisors is an integer number (10914143227).

Almost surely, 2^21828286453 is an apocalyptic number.

It is an amenable number.

21828286453 is a deficient number, since it is larger than the sum of its proper divisors (1).

21828286453 is an equidigital number, since it uses as much as digits as its factorization.

21828286453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1474560, while the sum is 49.

The spelling of 21828286453 in words is "twenty-one billion, eight hundred twenty-eight million, two hundred eighty-six thousand, four hundred fifty-three".