20780510721674 has 16 divisors (see below), whose sum is σ = 34008658578720. Its totient is φ = 9444523778160.

The previous prime is 20780510721623. The next prime is 20780510721697. The reversal of 20780510721674 is 47612701508702.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57962909 + ... + 58320320.

It is an arithmetic number, because the mean of its divisors is an integer number (2125541161170).

Almost surely, 2^{20780510721674} is an apocalyptic number.

20780510721674 is a deficient number, since it is larger than the sum of its proper divisors (13228147857046).

20780510721674 is a wasteful number, since it uses less digits than its factorization.

20780510721674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116291365.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 20780510721674 in words is "twenty trillion, seven hundred eighty billion, five hundred ten million, seven hundred twenty-one thousand, six hundred seventy-four".