7321734021 has 16 divisors (see below), whose sum is σ = 11170252800. Its totient is φ = 4178851248.

The previous prime is 7321733987. The next prime is 7321734053. The reversal of 7321734021 is 1204371237.

It is not a de Polignac number, because 7321734021 - 2¹⁸ = 7321471877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7321734021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7321734221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190161 + ... + 225398.

It is an arithmetic number, because the mean of its divisors is an integer number (698140800).

Almost surely, 2^7321734021 is an apocalyptic number.

It is an amenable number.

7321734021 is a deficient number, since it is larger than the sum of its proper divisors (3848518779).

7321734021 is a wasteful number, since it uses less digits than its factorization.

7321734021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416408.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 7321734021 is about 85567.1316628061. The cubic root of 7321734021 is about 1941.8006823310.

The spelling of 7321734021 in words is "seven billion, three hundred twenty-one million, seven hundred thirty-four thousand, twenty-one".