18953946903 has 16 divisors (see below), whose sum is σ = 25315488000. Its totient is φ = 12614208960.

The previous prime is 18953946899. The next prime is 18953946917. The reversal of 18953946903 is 30964935981.

It is not a de Polignac number, because 18953946903 - 2² = 18953946899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18953946943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6214923 + ... + 6217971.

It is an arithmetic number, because the mean of its divisors is an integer number (1582218000).

Almost surely, 2^18953946903 is an apocalyptic number.

18953946903 is a deficient number, since it is larger than the sum of its proper divisors (6361541097).

18953946903 is a wasteful number, since it uses less digits than its factorization.

18953946903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942.

The product of its (nonzero) digits is 6298560, while the sum is 57.

The spelling of 18953946903 in words is "eighteen billion, nine hundred fifty-three million, nine hundred forty-six thousand, nine hundred three".