14214081821 has 4 divisors (see below), whose sum is σ = 14304617532. Its totient is φ = 14123546112.

The previous prime is 14214081797. The next prime is 14214081841. The reversal of 14214081821 is 12818041241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12818041241 = 761 ⋅16843681.

It can be written as a sum of positive squares in 2 ways, for example, as 2220765625 + 11993316196 = 47125^2 + 109514^2 .

It is a cyclic number.

It is not a de Polignac number, because 14214081821 - 2⁶ = 14214081757 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 (14214081841) 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, 45267620 + ... + 45267933.

It is an arithmetic number, because the mean of its divisors is an integer number (3576154383).

Almost surely, 2^14214081821 is an apocalyptic number.

It is an amenable number.

14214081821 is a deficient number, since it is larger than the sum of its proper divisors (90535711).

14214081821 is an equidigital number, since it uses as much as digits as its factorization.

14214081821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90535710.

The product of its (nonzero) digits is 4096, while the sum is 32.

The spelling of 14214081821 in words is "fourteen billion, two hundred fourteen million, eighty-one thousand, eight hundred twenty-one".