21412520413406 has 32 divisors (see below), whose sum is σ = 34237791180000. Its totient is φ = 10008435315712.

The previous prime is 21412520413399. The next prime is 21412520413463. The reversal of 21412520413406 is 60431402521412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144910010 + ... + 145057698.

It is an arithmetic number, because the mean of its divisors is an integer number (1069930974375).

Almost surely, 2^{21412520413406} is an apocalyptic number.

21412520413406 is a deficient number, since it is larger than the sum of its proper divisors (12825270766594).

21412520413406 is a wasteful number, since it uses less digits than its factorization.

21412520413406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176476.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 21412520413406 its reverse (60431402521412), we get a palindrome (81843922934818).

The spelling of 21412520413406 in words is "twenty-one trillion, four hundred twelve billion, five hundred twenty million, four hundred thirteen thousand, four hundred six".