2166026021493 has 32 divisors (see below), whose sum is σ = 2933508275712. Its totient is φ = 1421466600000.

The previous prime is 2166026021473. The next prime is 2166026021501. The reversal of 2166026021493 is 3941206206612.

It is not a de Polignac number, because 2166026021493 - 2²¹ = 2166023924341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166026021413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42792546 + ... + 42843132.

It is an arithmetic number, because the mean of its divisors is an integer number (91672133616).

Almost surely, 2^{2166026021493} is an apocalyptic number.

It is an amenable number.

2166026021493 is a deficient number, since it is larger than the sum of its proper divisors (767482254219).

2166026021493 is a wasteful number, since it uses less digits than its factorization.

2166026021493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51505.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 2166026021493 in words is "two trillion, one hundred sixty-six billion, twenty-six million, twenty-one thousand, four hundred ninety-three".