21430453028267 has 4 divisors (see below), whose sum is σ = 21433790591616. Its totient is φ = 21427115464920.

The previous prime is 21430453028203. The next prime is 21430453028279. The reversal of 21430453028267 is 76282035403412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21430453028267 - 2⁶ = 21430453028203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21430453018267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668772043 + ... + 1668784884.

It is an arithmetic number, because the mean of its divisors is an integer number (5358447647904).

Almost surely, 2^{21430453028267} is an apocalyptic number.

21430453028267 is a deficient number, since it is larger than the sum of its proper divisors (3337563349).

21430453028267 is an equidigital number, since it uses as much as digits as its factorization.

21430453028267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337563348.

The product of its (nonzero) digits is 1935360, while the sum is 47.

The spelling of 21430453028267 in words is "twenty-one trillion, four hundred thirty billion, four hundred fifty-three million, twenty-eight thousand, two hundred sixty-seven".