13866374821 has 16 divisors (see below), whose sum is σ = 14996971584. Its totient is φ = 12745010304.

The previous prime is 13866374813. The next prime is 13866374833. The reversal of 13866374821 is 12847366831.

It is not a de Polignac number, because 13866374821 - 2³ = 13866374813 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 (13866374861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7270350 + ... + 7272256.

It is an arithmetic number, because the mean of its divisors is an integer number (937310724).

Almost surely, 2^13866374821 is an apocalyptic number.

It is an amenable number.

13866374821 is a deficient number, since it is larger than the sum of its proper divisors (1130596763).

13866374821 is a wasteful number, since it uses less digits than its factorization.

13866374821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020.

The product of its digits is 1161216, while the sum is 49.

The spelling of 13866374821 in words is "thirteen billion, eight hundred sixty-six million, three hundred seventy-four thousand, eight hundred twenty-one".