21830797453 has 2 divisors, whose sum is σ = 21830797454. Its totient is φ = 21830797452.

The previous prime is 21830797427. The next prime is 21830797477. The reversal of 21830797453 is 35479703812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12166531204 + 9664266249 = 110302^2 + 98307^2 .

It is a cyclic number.

It is not a de Polignac number, because 21830797453 - 2¹³ = 21830789261 is a prime.

It is a super-2 number, since 2×21830797453² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21830797397 and 21830797406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21830797493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10915398726 + 10915398727.

It is an arithmetic number, because the mean of its divisors is an integer number (10915398727).

Almost surely, 2^21830797453 is an apocalyptic number.

It is an amenable number.

21830797453 is a deficient number, since it is larger than the sum of its proper divisors (1).

21830797453 is an equidigital number, since it uses as much as digits as its factorization.

21830797453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 21830797453 in words is "twenty-one billion, eight hundred thirty million, seven hundred ninety-seven thousand, four hundred fifty-three".