4509536021 has 4 divisors (see below), whose sum is σ = 4510984044. Its totient is φ = 4508088000.

The previous prime is 4509536011. The next prime is 4509536023. The reversal of 4509536021 is 1206359054.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2124288100 + 2385247921 = 46090^2 + 48839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4509536021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4509536023) 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, 719330 + ... + 725571.

It is an arithmetic number, because the mean of its divisors is an integer number (1127746011).

Almost surely, 2^4509536021 is an apocalyptic number.

It is an amenable number.

4509536021 is a deficient number, since it is larger than the sum of its proper divisors (1448023).

4509536021 is a wasteful number, since it uses less digits than its factorization.

4509536021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448022.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 4509536021 is about 67153.0790135493. The cubic root of 4509536021 is about 1652.1289960038.

The spelling of 4509536021 in words is "four billion, five hundred nine million, five hundred thirty-six thousand, twenty-one".