1821046418131 has 4 divisors (see below), whose sum is σ = 1822427046000. Its totient is φ = 1819665790264.

The previous prime is 1821046418119. The next prime is 1821046418161. The reversal of 1821046418131 is 1318146401281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1821046418131 - 2¹⁵ = 1821046385363 is a prime.

It is a super-2 number, since 2×1821046418131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1821046418161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690311956 + ... + 690314593.

It is an arithmetic number, because the mean of its divisors is an integer number (455606761500).

Almost surely, 2^{1821046418131} is an apocalyptic number.

1821046418131 is a deficient number, since it is larger than the sum of its proper divisors (1380627869).

1821046418131 is a wasteful number, since it uses less digits than its factorization.

1821046418131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380627868.

The product of its (nonzero) digits is 36864, while the sum is 40.

The spelling of 1821046418131 in words is "one trillion, eight hundred twenty-one billion, forty-six million, four hundred eighteen thousand, one hundred thirty-one".