4573537021 has 4 divisors (see below), whose sum is σ = 4574129472. Its totient is φ = 4572944572.

The previous prime is 4573537009. The next prime is 4573537039. The reversal of 4573537021 is 1207353754.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1207353754 = 2 ⋅603676877.

It is a cyclic number.

It is not a de Polignac number, because 4573537021 - 2⁹ = 4573536509 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 (4573537091) 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, 284491 + ... + 300136.

It is an arithmetic number, because the mean of its divisors is an integer number (1143532368).

Almost surely, 2^4573537021 is an apocalyptic number.

It is an amenable number.

4573537021 is a deficient number, since it is larger than the sum of its proper divisors (592451).

4573537021 is an equidigital number, since it uses as much as digits as its factorization.

4573537021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592450.

The product of its (nonzero) digits is 88200, while the sum is 37.

The square root of 4573537021 is about 67627.9307756788. The cubic root of 4573537021 is about 1659.9081844267.

The spelling of 4573537021 in words is "four billion, five hundred seventy-three million, five hundred thirty-seven thousand, twenty-one".