2021387695 has 4 divisors (see below), whose sum is σ = 2425665240. Its totient is φ = 1617110152.

The previous prime is 2021387659. The next prime is 2021387749. The reversal of 2021387695 is 5967831202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5967831202 = 2 ⋅2983915601.

It is a cyclic number.

It is not a de Polignac number, because 2021387695 - 2¹¹ = 2021385647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202138765 + ... + 202138774.

It is an arithmetic number, because the mean of its divisors is an integer number (606416310).

Almost surely, 2^2021387695 is an apocalyptic number.

2021387695 is a deficient number, since it is larger than the sum of its proper divisors (404277545).

2021387695 is an equidigital number, since it uses as much as digits as its factorization.

2021387695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404277544.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 2021387695 is about 44959.8453622785. The cubic root of 2021387695 is about 1264.3962696870.

The spelling of 2021387695 in words is "two billion, twenty-one million, three hundred eighty-seven thousand, six hundred ninety-five".