1818400203822 has 16 divisors (see below), whose sum is σ = 3636813791952. Its totient is φ = 606131170560.

The previous prime is 1818400203811. The next prime is 1818400203839. The reversal of 1818400203822 is 2283020048181.

It is a super-2 number, since 2×1818400203822² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2488072 + ... + 3134852.

It is an arithmetic number, because the mean of its divisors is an integer number (227300861997).

Almost surely, 2^{1818400203822} is an apocalyptic number.

1818400203822 is an abundant number, since it is smaller than the sum of its proper divisors (1818413588130).

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

1818400203822 is a wasteful number, since it uses less digits than its factorization.

1818400203822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115363.

The product of its (nonzero) digits is 49152, while the sum is 39.

The spelling of 1818400203822 in words is "one trillion, eight hundred eighteen billion, four hundred million, two hundred three thousand, eight hundred twenty-two".