1894401812052 has 30 divisors (see below), whose sum is σ = 4952340540378. Its totient is φ = 631467270576.

The previous prime is 1894401812003. The next prime is 1894401812057. The reversal of 1894401812052 is 2502181044981.

1894401812052 is a `hidden beast` number, since 1 + 8 + 9 + 440 + 181 + 20 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1779118474896 + 115283337156 = 1333836^2 + 339534^2 .

It is a super-2 number, since 2×1894401812052² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1894401811989 and 1894401812007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894401812057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2923459263 + ... + 2923459910.

Almost surely, 2^{1894401812052} is an apocalyptic number.

1894401812052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1894401812052 is an abundant number, since it is smaller than the sum of its proper divisors (3057938728326).

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

1894401812052 is a wasteful number, since it uses less digits than its factorization.

1894401812052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5846919189 (or 5846919178 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 1894401812052 in words is "one trillion, eight hundred ninety-four billion, four hundred one million, eight hundred twelve thousand, fifty-two".