1812021514 has 16 divisors (see below), whose sum is σ = 2739844800. Its totient is φ = 898750944.

The previous prime is 1812021493. The next prime is 1812021521. The reversal of 1812021514 is 4151202181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511702 + ... + 515230.

It is an arithmetic number, because the mean of its divisors is an integer number (171240300).

Almost surely, 2^1812021514 is an apocalyptic number.

1812021514 is a deficient number, since it is larger than the sum of its proper divisors (927823286).

1812021514 is a wasteful number, since it uses less digits than its factorization.

1812021514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1812021514 is about 42567.8460108096. The cubic root of 1812021514 is about 1219.1424399877.

Adding to 1812021514 its reverse (4151202181), we get a palindrome (5963223695).

The spelling of 1812021514 in words is "one billion, eight hundred twelve million, twenty-one thousand, five hundred fourteen".