1800133450 has 24 divisors (see below), whose sum is σ = 3350059020. Its totient is φ = 719664000.

The previous prime is 1800133429. The next prime is 1800133453. The reversal of 1800133450 is 543310081.

It can be written as a sum of positive squares in 6 ways, for example, as 412049401 + 1388084049 = 20299^2 + 37257^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1800133453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94750 + ... + 112150.

Almost surely, 2^1800133450 is an apocalyptic number.

1800133450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1800133450 is a deficient number, since it is larger than the sum of its proper divisors (1549925570).

1800133450 is a wasteful number, since it uses less digits than its factorization.

1800133450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19482 (or 19477 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1800133450 is about 42427.9795653764. The cubic root of 1800133450 is about 1216.4704602183.

The spelling of 1800133450 in words is "one billion, eight hundred million, one hundred thirty-three thousand, four hundred fifty".