2180926905 has 16 divisors (see below), whose sum is σ = 3496488000. Its totient is φ = 1160826048.

The previous prime is 2180926901. The next prime is 2180926919. The reversal of 2180926905 is 5096290812.

It is not a de Polignac number, because 2180926905 - 2² = 2180926901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2180926901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138202 + ... + 153171.

It is an arithmetic number, because the mean of its divisors is an integer number (218530500).

Almost surely, 2^2180926905 is an apocalyptic number.

It is an amenable number.

2180926905 is a deficient number, since it is larger than the sum of its proper divisors (1315561095).

2180926905 is a wasteful number, since it uses less digits than its factorization.

2180926905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291880.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 2180926905 is about 46700.3951268081. The cubic root of 2180926905 is about 1296.8220016509.

The spelling of 2180926905 in words is "two billion, one hundred eighty million, nine hundred twenty-six thousand, nine hundred five".