20315301224 has 8 divisors (see below), whose sum is σ = 38091189810. Its totient is φ = 10157650608.

The previous prime is 20315301221. The next prime is 20315301233. The reversal of 20315301224 is 42210351302.

It can be written as a sum of positive squares in only one way, i.e., 16131540100 + 4183761124 = 127010^2 + 64682^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20315301224² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20315301224.

It is not an unprimeable number, because it can be changed into a prime (20315301221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269706319 + ... + 1269706334.

Almost surely, 2^20315301224 is an apocalyptic number.

It is an amenable number.

20315301224 is a deficient number, since it is larger than the sum of its proper divisors (17775888586).

20315301224 is a wasteful number, since it uses less digits than its factorization.

20315301224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539412659 (or 2539412655 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20315301224 its reverse (42210351302), we get a palindrome (62525652526).

The spelling of 20315301224 in words is "twenty billion, three hundred fifteen million, three hundred one thousand, two hundred twenty-four".