14921630081 has 4 divisors (see below), whose sum is σ = 15007882452. Its totient is φ = 14835377712.

The previous prime is 14921630057. The next prime is 14921630083. The reversal of 14921630081 is 18003612941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18003612941 = 58061 ⋅310081.

It can be written as a sum of positive squares in 2 ways, for example, as 11154739456 + 3766890625 = 105616^2 + 61375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14921630081 is a prime.

It is a super-2 number, since 2×14921630081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14921630083) 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, 43125926 + ... + 43126271.

It is an arithmetic number, because the mean of its divisors is an integer number (3751970613).

Almost surely, 2^14921630081 is an apocalyptic number.

It is an amenable number.

14921630081 is a deficient number, since it is larger than the sum of its proper divisors (86252371).

14921630081 is an equidigital number, since it uses as much as digits as its factorization.

14921630081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86252370.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 14921630081 in words is "fourteen billion, nine hundred twenty-one million, six hundred thirty thousand, eighty-one".