2120854947 has 16 divisors (see below), whose sum is σ = 2849613312. Its totient is φ = 1403020800.

The previous prime is 2120854913. The next prime is 2120854949. The reversal of 2120854947 is 7494580212.

It is not a de Polignac number, because 2120854947 - 2⁷ = 2120854819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120854899 and 2120854908.

It is not an unprimeable number, because it can be changed into a prime (2120854949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549378 + ... + 553224.

It is an arithmetic number, because the mean of its divisors is an integer number (178100832).

Almost surely, 2^2120854947 is an apocalyptic number.

2120854947 is a deficient number, since it is larger than the sum of its proper divisors (728758365).

2120854947 is a wasteful number, since it uses less digits than its factorization.

2120854947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 2120854947 is about 46052.7409282010. The cubic root of 2120854947 is about 1284.8043219226.

The spelling of 2120854947 in words is "two billion, one hundred twenty million, eight hundred fifty-four thousand, nine hundred forty-seven".