1821669864922 has 16 divisors (see below), whose sum is σ = 2733731622720. Its totient is φ = 910426088032.

The previous prime is 1821669864919. The next prime is 1821669864923. The reversal of 1821669864922 is 2294689661281.

It is not an unprimeable number, because it can be changed into a prime (1821669864923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47024253 + ... + 47062975.

It is an arithmetic number, because the mean of its divisors is an integer number (170858226420).

Almost surely, 2^{1821669864922} is an apocalyptic number.

1821669864922 is a deficient number, since it is larger than the sum of its proper divisors (912061757798).

1821669864922 is a wasteful number, since it uses less digits than its factorization.

1821669864922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48677.

The product of its digits is 35831808, while the sum is 64.

The spelling of 1821669864922 in words is "one trillion, eight hundred twenty-one billion, six hundred sixty-nine million, eight hundred sixty-four thousand, nine hundred twenty-two".