1801802002 has 32 divisors (see below), whose sum is σ = 3628808064. Its totient is φ = 648000000.

The previous prime is 1801801979. The next prime is 1801802021. The reversal of 1801802002 is 2002081081.

It is a super-2 number, since 2×1801802002² = 6492980908822416008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447999 + ... + 452002.

It is an arithmetic number, because the mean of its divisors is an integer number (113400252).

Almost surely, 2^1801802002 is an apocalyptic number.

1801802002 is an abundant number, since it is smaller than the sum of its proper divisors (1827006062).

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

1801802002 is a wasteful number, since it uses less digits than its factorization.

1801802002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900034.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1801802002 is about 42447.6383559792. The cubic root of 1801802002 is about 1216.8461948462.

Adding to 1801802002 its reverse (2002081081), we get a palindrome (3803883083).

The spelling of 1801802002 in words is "one billion, eight hundred one million, eight hundred two thousand, two".