21424668230867 has 4 divisors (see below), whose sum is σ = 23372365342776. Its totient is φ = 19476971118960.

The previous prime is 21424668230831. The next prime is 21424668230873. The reversal of 21424668230867 is 76803286642412.

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 21424668230867 - 2⁸ = 21424668230611 is a prime.

It is a super-2 number, since 2×21424668230867² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21424668230807) 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, 973848555938 + ... + 973848555959.

It is an arithmetic number, because the mean of its divisors is an integer number (5843091335694).

Almost surely, 2^{21424668230867} is an apocalyptic number.

21424668230867 is a deficient number, since it is larger than the sum of its proper divisors (1947697111909).

21424668230867 is a wasteful number, since it uses less digits than its factorization.

21424668230867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947697111908.

The product of its (nonzero) digits is 37158912, while the sum is 59.

The spelling of 21424668230867 in words is "twenty-one trillion, four hundred twenty-four billion, six hundred sixty-eight million, two hundred thirty thousand, eight hundred sixty-seven".