2021532663 has 4 divisors (see below), whose sum is σ = 2695376888. Its totient is φ = 1347688440.

The previous prime is 2021532587. The next prime is 2021532673. The reversal of 2021532663 is 3662351202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2021532663 - 2¹⁰ = 2021531639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021532663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021532673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336922108 + ... + 336922113.

It is an arithmetic number, because the mean of its divisors is an integer number (673844222).

Almost surely, 2^2021532663 is an apocalyptic number.

2021532663 is a deficient number, since it is larger than the sum of its proper divisors (673844225).

2021532663 is an equidigital number, since it uses as much as digits as its factorization.

2021532663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673844224.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 2021532663 is about 44961.4575275313. The cubic root of 2021532663 is about 1264.4264952291.

Adding to 2021532663 its reverse (3662351202), we get a palindrome (5683883865).

The spelling of 2021532663 in words is "two billion, twenty-one million, five hundred thirty-two thousand, six hundred sixty-three".