21412520413405 has 32 divisors (see below), whose sum is σ = 28785557606400. Its totient is φ = 15159060571200.

The previous prime is 21412520413399. The next prime is 21412520413463. The reversal of 21412520413405 is 50431402521412.

It is not a de Polignac number, because 21412520413405 - 2²³ = 21412512024797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34396315 + ... + 35013304.

It is an arithmetic number, because the mean of its divisors is an integer number (899548675200).

Almost surely, 2^{21412520413405} is an apocalyptic number.

It is an amenable number.

21412520413405 is a deficient number, since it is larger than the sum of its proper divisors (7373037192995).

21412520413405 is a wasteful number, since it uses less digits than its factorization.

21412520413405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69409785.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 21412520413405 its reverse (50431402521412), we get a palindrome (71843922934817).

The spelling of 21412520413405 in words is "twenty-one trillion, four hundred twelve billion, five hundred twenty million, four hundred thirteen thousand, four hundred five".