2021694163 has 6 divisors (see below), whose sum is σ = 2046352364. Its totient is φ = 1997329596.

The previous prime is 2021694127. The next prime is 2021694173. The reversal of 2021694163 is 3614961202.

It is a happy number.

It is not a de Polignac number, because 2021694163 - 2¹³ = 2021685971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021694173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139845 + ... + 153622.

Almost surely, 2^2021694163 is an apocalyptic number.

2021694163 is a deficient number, since it is larger than the sum of its proper divisors (24658201).

2021694163 is an frugal number, since it uses more digits than its factorization.

2021694163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293633 (or 293550 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2021694163 is about 44963.2534743650. The cubic root of 2021694163 is about 1264.4601659590.

The spelling of 2021694163 in words is "two billion, twenty-one million, six hundred ninety-four thousand, one hundred sixty-three".