1803213504972 has 36 divisors (see below), whose sum is σ = 4972497848136. Its totient is φ = 546428334720.

The previous prime is 1803213504971. The next prime is 1803213505007. The reversal of 1803213504972 is 2794053123081.

It is a happy number.

1803213504972 is a `hidden beast` number, since 1 + 80 + 32 + 1 + 3 + 50 + 497 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1803213504971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2276784333 + ... + 2276785124.

It is an arithmetic number, because the mean of its divisors is an integer number (138124940226).

Almost surely, 2^{1803213504972} is an apocalyptic number.

1803213504972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1803213504972 is an abundant number, since it is smaller than the sum of its proper divisors (3169284343164).

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

1803213504972 is a wasteful number, since it uses less digits than its factorization.

1803213504972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553569478 (or 4553569473 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 1803213504972 in words is "one trillion, eight hundred three billion, two hundred thirteen million, five hundred four thousand, nine hundred seventy-two".