1803912002 has 4 divisors (see below), whose sum is σ = 2705868006. Its totient is φ = 901956000.

The previous prime is 1803911951. The next prime is 1803912013. The reversal of 1803912002 is 2002193081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2002193081 = 7 ⋅286027583.

It can be written as a sum of positive squares in only one way, i.e., 1447117681 + 356794321 = 38041^2 + 18889^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450977999 + ... + 450978002.

Almost surely, 2^1803912002 is an apocalyptic number.

1803912002 is a deficient number, since it is larger than the sum of its proper divisors (901956004).

1803912002 is an equidigital number, since it uses as much as digits as its factorization.

1803912002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901956003.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1803912002 is about 42472.4852345610. The cubic root of 1803912002 is about 1217.3210054115.

The spelling of 1803912002 in words is "one billion, eight hundred three million, nine hundred twelve thousand, two".