21423424683774 has 8 divisors (see below), whose sum is σ = 42846849367560. Its totient is φ = 7141141561256.

The previous prime is 21423424683709. The next prime is 21423424683809. The reversal of 21423424683774 is 47738642432412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21423424683774 is an admirable number.

It is a super-2 number, since 2×21423424683774² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785285390309 + ... + 1785285390320.

It is an arithmetic number, because the mean of its divisors is an integer number (5355856170945).

Almost surely, 2^{21423424683774} is an apocalyptic number.

21423424683774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21423424683774 is a wasteful number, since it uses less digits than its factorization.

21423424683774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570570780634.

The product of its digits is 43352064, while the sum is 57.

The spelling of 21423424683774 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, six hundred eighty-three thousand, seven hundred seventy-four".