18208245704450 has 24 divisors (see below), whose sum is σ = 33867459004980. Its totient is φ = 7283272046400.

The previous prime is 18208245704437. The next prime is 18208245704497. The reversal of 18208245704450 is 5440754280281.

It can be written as a sum of positive squares in 6 ways, for example, as 6690183998521 + 11518061705929 = 2586539^2 + 3393827^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19490636 + ... + 20403464.

Almost surely, 2^{18208245704450} is an apocalyptic number.

18208245704450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18208245704450 is a deficient number, since it is larger than the sum of its proper divisors (15659213300530).

18208245704450 is a wasteful number, since it uses less digits than its factorization.

18208245704450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311782 (or 1311777 counting only the distinct ones).

The product of its (nonzero) digits is 2867200, while the sum is 50.

The spelling of 18208245704450 in words is "eighteen trillion, two hundred eight billion, two hundred forty-five million, seven hundred four thousand, four hundred fifty".