21412320234 has 8 divisors (see below), whose sum is σ = 42824640480. Its totient is φ = 7137440076.

The previous prime is 21412320227. The next prime is 21412320253. The reversal of 21412320234 is 43202321412.

It is a happy number.

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

21412320234 is an admirable 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, 1784360014 + ... + 1784360025.

It is an arithmetic number, because the mean of its divisors is an integer number (5353080060).

Almost surely, 2^21412320234 is an apocalyptic number.

21412320234 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.

21412320234 is a wasteful number, since it uses less digits than its factorization.

21412320234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568720044.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21412320234 its reverse (43202321412), we get a palindrome (64614641646).

The spelling of 21412320234 in words is "twenty-one billion, four hundred twelve million, three hundred twenty thousand, two hundred thirty-four".