21412135406 has 8 divisors (see below), whose sum is σ = 32119366440. Its totient is φ = 10705679928.

The previous prime is 21412135397. The next prime is 21412135417. The reversal of 21412135406 is 60453121412.

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

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, 119096 + ... + 238763.

It is an arithmetic number, because the mean of its divisors is an integer number (4014920805).

Almost surely, 2^21412135406 is an apocalyptic number.

21412135406 is a deficient number, since it is larger than the sum of its proper divisors (10707231034).

21412135406 is a wasteful number, since it uses less digits than its factorization.

21412135406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387778.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21412135406 its reverse (60453121412), we get a palindrome (81865256818).

The spelling of 21412135406 in words is "twenty-one billion, four hundred twelve million, one hundred thirty-five thousand, four hundred six".