1814748921 has 32 divisors (see below), whose sum is σ = 2902176000. Its totient is φ = 1117315584.

The previous prime is 1814748907. The next prime is 1814748961. The reversal of 1814748921 is 1298474181.

1814748921 is a `hidden beast` number, since 1 + 8 + 147 + 489 + 21 = 666.

It is not a de Polignac number, because 1814748921 - 2⁶ = 1814748857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1814748961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32376 + ... + 68393.

It is an arithmetic number, because the mean of its divisors is an integer number (90693000).

Almost surely, 2^1814748921 is an apocalyptic number.

It is an amenable number.

1814748921 is a deficient number, since it is larger than the sum of its proper divisors (1087427079).

1814748921 is a wasteful number, since it uses less digits than its factorization.

1814748921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100830 (or 100824 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 1814748921 is about 42599.8699645903. The cubic root of 1814748921 is about 1219.7538070364.

The spelling of 1814748921 in words is "one billion, eight hundred fourteen million, seven hundred forty-eight thousand, nine hundred twenty-one".