18846722953 has 4 divisors (see below), whose sum is σ = 19838655760. Its totient is φ = 17854790148.

The previous prime is 18846722941. The next prime is 18846722957. The reversal of 18846722953 is 35922764881.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35922764881 = 31327 ⋅1146703.

It is a cyclic number.

It is not a de Polignac number, because 18846722953 - 2²¹ = 18844625801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18846722894 and 18846722903.

It is not an unprimeable number, because it can be changed into a prime (18846722957) 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, 495966375 + ... + 495966412.

It is an arithmetic number, because the mean of its divisors is an integer number (4959663940).

Almost surely, 2^18846722953 is an apocalyptic number.

It is an amenable number.

18846722953 is a deficient number, since it is larger than the sum of its proper divisors (991932807).

18846722953 is an equidigital number, since it uses as much as digits as its factorization.

18846722953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991932806.

The product of its digits is 5806080, while the sum is 55.

The spelling of 18846722953 in words is "eighteen billion, eight hundred forty-six million, seven hundred twenty-two thousand, nine hundred fifty-three".