1816503072 has 24 divisors (see below), whose sum is σ = 4768320816. Its totient is φ = 605500992.

The previous prime is 1816503071. The next prime is 1816503089. The reversal of 1816503072 is 2703056181.

It is a tau number, because it is divible by the number of its divisors (24).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1816503071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9460858 + ... + 9461049.

It is an arithmetic number, because the mean of its divisors is an integer number (198680034).

Almost surely, 2^1816503072 is an apocalyptic number.

1816503072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1816503072 is an abundant number, since it is smaller than the sum of its proper divisors (2951817744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1816503072 is a wasteful number, since it uses less digits than its factorization.

1816503072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18921920 (or 18921912 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1816503072 is about 42620.4536813019. The cubic root of 1816503072 is about 1220.1466884446.

The spelling of 1816503072 in words is "one billion, eight hundred sixteen million, five hundred three thousand, seventy-two".