1953500018 has 6 divisors (see below), whose sum is σ = 2930343789. Its totient is φ = 976718756.

The previous prime is 1953499997. The next prime is 1953500033. The reversal of 1953500018 is 8100053591.

It can be written as a sum of positive squares in 2 ways, for example, as 1926946609 + 26553409 = 43897^2 + 5153^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=31253.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 46880 + ... + 78132.

Almost surely, 2^1953500018 is an apocalyptic number.

1953500018 is a deficient number, since it is larger than the sum of its proper divisors (976843771).

1953500018 is an frugal number, since it uses more digits than its factorization.

1953500018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62508 (or 31255 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1953500018 is about 44198.4164648463. The cubic root of 1953500018 is about 1250.0799987201.

Multiplying 1953500018 by its sum of digits (32), we get a square (62512000576 = 250024²).

The spelling of 1953500018 in words is "one billion, nine hundred fifty-three million, five hundred thousand, eighteen".