2105079217974 has 24 divisors (see below), whose sum is σ = 4677977510760. Its totient is φ = 701689518720.

The previous prime is 2105079217903. The next prime is 2105079217999. The reversal of 2105079217974 is 4797129705012.

2105079217974 is a `hidden beast` number, since 21 + 0 + 507 + 9 + 21 + 7 + 97 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2105079217974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10563094 + ... + 10760534.

It is an arithmetic number, because the mean of its divisors is an integer number (194915729615).

Almost surely, 2^{2105079217974} is an apocalyptic number.

2105079217974 is an abundant number, since it is smaller than the sum of its proper divisors (2572898292786).

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

2105079217974 is an frugal number, since it uses more digits than its factorization.

2105079217974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394893 (or 197446 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 54.

Multiplying 2105079217974 by its sum of digits (54), we get a square (113674277770596 = 10661814²).

2105079217974 divided by its sum of digits (54) gives a square (38982948481 = 197441²).

The spelling of 2105079217974 in words is "two trillion, one hundred five billion, seventy-nine million, two hundred seventeen thousand, nine hundred seventy-four".