18503955145 has 32 divisors (see below), whose sum is σ = 24299533440. Its totient is φ = 13443978240.

The previous prime is 18503955143. The next prime is 18503955203. The reversal of 18503955145 is 54155930581.

It is not a de Polignac number, because 18503955145 - 2¹ = 18503955143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18503955095 and 18503955104.

It is not an unprimeable number, because it can be changed into a prime (18503955143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4392090 + ... + 4396300.

It is an arithmetic number, because the mean of its divisors is an integer number (759360420).

Almost surely, 2^18503955145 is an apocalyptic number.

It is an amenable number.

18503955145 is a deficient number, since it is larger than the sum of its proper divisors (5795578295).

18503955145 is a wasteful number, since it uses less digits than its factorization.

18503955145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305.

The product of its (nonzero) digits is 540000, while the sum is 46.

The spelling of 18503955145 in words is "eighteen billion, five hundred three million, nine hundred fifty-five thousand, one hundred forty-five".