21423423414 has 8 divisors (see below), whose sum is σ = 42846846840. Its totient is φ = 7141141136.

The previous prime is 21423423383. The next prime is 21423423449. The reversal of 21423423414 is 41432432412.

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

21423423414 is an admirable 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, 1785285279 + ... + 1785285290.

It is an arithmetic number, because the mean of its divisors is an integer number (5355855855).

Almost surely, 2^21423423414 is an apocalyptic number.

21423423414 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.

21423423414 is a wasteful number, since it uses less digits than its factorization.

21423423414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570570574.

The product of its digits is 18432, while the sum is 30.

Adding to 21423423414 its reverse (41432432412), we get a palindrome (62855855826).

The spelling of 21423423414 in words is "twenty-one billion, four hundred twenty-three million, four hundred twenty-three thousand, four hundred fourteen".