1820001964164 has 48 divisors (see below), whose sum is σ = 4298244108480. Its totient is φ = 599301159040.

The previous prime is 1820001964147. The next prime is 1820001964171. The reversal of 1820001964164 is 4614691000281.

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, 11134822 + ... + 11297090.

It is an arithmetic number, because the mean of its divisors is an integer number (89546752260).

Almost surely, 2^{1820001964164} is an apocalyptic number.

It is an amenable number.

1820001964164 is an abundant number, since it is smaller than the sum of its proper divisors (2478242144316).

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

1820001964164 is a wasteful number, since it uses less digits than its factorization.

1820001964164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173620 (or 173618 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 1820001964164 in words is "one trillion, eight hundred twenty billion, one million, nine hundred sixty-four thousand, one hundred sixty-four".