14138489821 has 2 divisors, whose sum is σ = 14138489822. Its totient is φ = 14138489820.

The previous prime is 14138489797. The next prime is 14138489831. The reversal of 14138489821 is 12898483141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10103064196 + 4035425625 = 100514^2 + 63525^2 .

It is a cyclic number.

It is not a de Polignac number, because 14138489821 - 2³¹ = 11991006173 is a prime.

It is a super-2 number, since 2×14138489821² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14138489831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7069244910 + 7069244911.

It is an arithmetic number, because the mean of its divisors is an integer number (7069244911).

Almost surely, 2^14138489821 is an apocalyptic number.

It is an amenable number.

14138489821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14138489821 is an equidigital number, since it uses as much as digits as its factorization.

14138489821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 49.

The spelling of 14138489821 in words is "fourteen billion, one hundred thirty-eight million, four hundred eighty-nine thousand, eight hundred twenty-one".