2101966947 has 24 divisors (see below), whose sum is σ = 3147096576. Its totient is φ = 1351007856.

The previous prime is 2101966939. The next prime is 2101966963. The reversal of 2101966947 is 7496691012.

It is not a de Polignac number, because 2101966947 - 2³ = 2101966939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101966907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8743 + ... + 65424.

It is an arithmetic number, because the mean of its divisors is an integer number (131129024).

Almost surely, 2^2101966947 is an apocalyptic number.

2101966947 is a deficient number, since it is larger than the sum of its proper divisors (1045129629).

2101966947 is a wasteful number, since it uses less digits than its factorization.

2101966947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74287 (or 74284 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 2101966947 is about 45847.2130777870. The cubic root of 2101966947 is about 1280.9788547243.

The spelling of 2101966947 in words is "two billion, one hundred one million, nine hundred sixty-six thousand, nine hundred forty-seven".