2021454765 has 64 divisors (see below), whose sum is σ = 3970252800. Its totient is φ = 967636800.

The previous prime is 2021454737. The next prime is 2021454779. The reversal of 2021454765 is 5674541202.

It is a happy number.

It is not a de Polignac number, because 2021454765 - 2⁵ = 2021454733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108700 + ... + 125930.

It is an arithmetic number, because the mean of its divisors is an integer number (62035200).

Almost surely, 2^2021454765 is an apocalyptic number.

It is an amenable number.

2021454765 is a deficient number, since it is larger than the sum of its proper divisors (1948798035).

2021454765 is a wasteful number, since it uses less digits than its factorization.

2021454765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17335 (or 17329 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 2021454765 is about 44960.5912438882. The cubic root of 2021454765 is about 1264.4102538293.

Adding to 2021454765 its reverse (5674541202), we get a palindrome (7695995967).

The spelling of 2021454765 in words is "two billion, twenty-one million, four hundred fifty-four thousand, seven hundred sixty-five".