1820018402 has 32 divisors (see below), whose sum is σ = 2951334144. Its totient is φ = 838656000.

The previous prime is 1820018383. The next prime is 1820018429. The reversal of 1820018402 is 2048100281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362018 + ... + 367010.

It is an arithmetic number, because the mean of its divisors is an integer number (92229192).

Almost surely, 2^1820018402 is an apocalyptic number.

1820018402 is a deficient number, since it is larger than the sum of its proper divisors (1131315742).

1820018402 is a wasteful number, since it uses less digits than its factorization.

1820018402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 1820018402 is about 42661.6736896245. The cubic root of 1820018402 is about 1220.9332646667.

Adding to 1820018402 its reverse (2048100281), we get a palindrome (3868118683).

The spelling of 1820018402 in words is "one billion, eight hundred twenty million, eighteen thousand, four hundred two".