2146820643 has 12 divisors (see below), whose sum is σ = 3382869048. Its totient is φ = 1301103360.

The previous prime is 2146820629. The next prime is 2146820651. The reversal of 2146820643 is 3460286412.

2146820643 is a `hidden beast` number, since 2 + 1 + 4 + 6 + 8 + 2 + 0 + 643 = 666.

It is not a de Polignac number, because 2146820643 - 2⁸ = 2146820387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2146820598 and 2146820607.

It is not an unprimeable number, because it can be changed into a prime (2146840643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10842430 + ... + 10842627.

It is an arithmetic number, because the mean of its divisors is an integer number (281905754).

Almost surely, 2^2146820643 is an apocalyptic number.

2146820643 is a deficient number, since it is larger than the sum of its proper divisors (1236048405).

2146820643 is a wasteful number, since it uses less digits than its factorization.

2146820643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21685074 (or 21685071 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 2146820643 is about 46333.7959053648. The cubic root of 2146820643 is about 1290.0263686696.

The spelling of 2146820643 in words is "two billion, one hundred forty-six million, eight hundred twenty thousand, six hundred forty-three".