18966022953 has 24 divisors (see below), whose sum is σ = 26944628640. Its totient is φ = 11864117760.

The previous prime is 18966022937. The next prime is 18966022973. The reversal of 18966022953 is 35922066981.

It is not a de Polignac number, because 18966022953 - 2⁴ = 18966022937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 18966022896 and 18966022905.

It is not an unprimeable number, because it can be changed into a prime (18966022913) 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 23 ways as a sum of consecutive naturals, for example, 253933 + ... + 320021.

It is an arithmetic number, because the mean of its divisors is an integer number (1122692860).

Almost surely, 2^18966022953 is an apocalyptic number.

It is an amenable number.

18966022953 is a deficient number, since it is larger than the sum of its proper divisors (7978605687).

18966022953 is a wasteful number, since it uses less digits than its factorization.

18966022953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66457 (or 66440 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 18966022953 in words is "eighteen billion, nine hundred sixty-six million, twenty-two thousand, nine hundred fifty-three".