5091360021 has 24 divisors (see below), whose sum is σ = 8119421856. Its totient is φ = 3048491040.

The previous prime is 5091360019. The next prime is 5091360047. The reversal of 5091360021 is 1200631905.

5091360021 is a `hidden beast` number, since 50 + 9 + 1 + 3 + 600 + 2 + 1 = 666.

It is not a de Polignac number, because 5091360021 - 2¹ = 5091360019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5091360091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301590 + ... + 318023.

It is an arithmetic number, because the mean of its divisors is an integer number (338309244).

Almost surely, 2^5091360021 is an apocalyptic number.

It is an amenable number.

5091360021 is a deficient number, since it is larger than the sum of its proper divisors (3028061835).

5091360021 is a wasteful number, since it uses less digits than its factorization.

5091360021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619713 (or 619710 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 5091360021 is about 71353.7666910444. The cubic root of 5091360021 is about 1720.3280450783.

Adding to 5091360021 its reverse (1200631905), we get a palindrome (6291991926).

The spelling of 5091360021 in words is "five billion, ninety-one million, three hundred sixty thousand, twenty-one".