21412135436 has 12 divisors (see below), whose sum is σ = 37476641328. Its totient is φ = 10704523632.

The previous prime is 21412135417. The next prime is 21412135469. The reversal of 21412135436 is 63453121412.

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, 354536 + ... + 410511.

It is an arithmetic number, because the mean of its divisors is an integer number (3123053444).

Almost surely, 2^21412135436 is an apocalyptic number.

It is an amenable number.

21412135436 is a deficient number, since it is larger than the sum of its proper divisors (16064505892).

21412135436 is a wasteful number, since it uses less digits than its factorization.

21412135436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772048 (or 772046 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

Adding to 21412135436 its reverse (63453121412), we get a palindrome (84865256848).

The spelling of 21412135436 in words is "twenty-one billion, four hundred twelve million, one hundred thirty-five thousand, four hundred thirty-six".