14923506781 has 4 divisors (see below), whose sum is σ = 14923776064. Its totient is φ = 14923237500.

The previous prime is 14923506743. The next prime is 14923506791. The reversal of 14923506781 is 18760532941.

14923506781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 5-Lehmer number, since φ(14923506781) divides (14923506781-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 14923506781 - 2¹⁹ = 14922982493 is a prime.

It is a super-2 number, since 2×14923506781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14923506791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17595 + ... + 173656.

It is an arithmetic number, because the mean of its divisors is an integer number (3730944016).

It is a 2-persistent number, because it is pandigital, and so is 2⋅14923506781 = 29847013562, but 3⋅14923506781 = 44770520343 is not.

Almost surely, 2^14923506781 is an apocalyptic number.

It is an amenable number.

14923506781 is a deficient number, since it is larger than the sum of its proper divisors (269283).

14923506781 is an equidigital number, since it uses as much as digits as its factorization.

14923506781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269282.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 14923506781 in words is "fourteen billion, nine hundred twenty-three million, five hundred six thousand, seven hundred eighty-one".