21415141613 has 4 divisors (see below), whose sum is σ = 21569207520. Its totient is φ = 21261075708.

The previous prime is 21415141591. The next prime is 21415141663. The reversal of 21415141613 is 31614151412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21415141613 - 2⁶ = 21415141549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415141663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77032745 + ... + 77033022.

It is an arithmetic number, because the mean of its divisors is an integer number (5392301880).

Almost surely, 2^21415141613 is an apocalyptic number.

It is an amenable number.

21415141613 is a deficient number, since it is larger than the sum of its proper divisors (154065907).

21415141613 is a wasteful number, since it uses less digits than its factorization.

21415141613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154065906.

The product of its digits is 2880, while the sum is 29.

The spelling of 21415141613 in words is "twenty-one billion, four hundred fifteen million, one hundred forty-one thousand, six hundred thirteen".