20722315 has 8 divisors (see below), whose sum is σ = 25146720. Its totient is φ = 16391232.

The previous prime is 20722313. The next prime is 20722319. The reversal of 20722315 is 51322702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20722315 - 2¹ = 20722313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20722313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22839 + ... + 23728.

It is an arithmetic number, because the mean of its divisors is an integer number (3143340).

Almost surely, 2^20722315 is an apocalyptic number.

20722315 is a deficient number, since it is larger than the sum of its proper divisors (4424405).

20722315 is an equidigital number, since it uses as much as digits as its factorization.

20722315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46661.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20722315 is about 4552.1769517452. The cubic root of 20722315 is about 274.6709673568.

It can be divided in two parts, 207 and 22315, that added together give a palindrome (22522).

The spelling of 20722315 in words is "twenty million, seven hundred twenty-two thousand, three hundred fifteen".