2021408694943 has 12 divisors (see below), whose sum is σ = 2255041360600. Its totient is φ = 1810216734480.

The previous prime is 2021408694887. The next prime is 2021408694953. The reversal of 2021408694943 is 3494968041202.

It is a de Polignac number, because none of the positive numbers 2^k-2021408694943 is a prime.

It is a super-2 number, since 2×2021408694943² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021408694953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124662468 + ... + 124678681.

Almost surely, 2^{2021408694943} is an apocalyptic number.

2021408694943 is a deficient number, since it is larger than the sum of its proper divisors (233632665657).

2021408694943 is a wasteful number, since it uses less digits than its factorization.

2021408694943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249341238 (or 249341227 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 2021408694943 in words is "two trillion, twenty-one billion, four hundred eight million, six hundred ninety-four thousand, nine hundred forty-three".