20315003247 has 144 divisors (see below), whose sum is σ = 39675321504. Its totient is φ = 9870336000.

The previous prime is 20315003239. The next prime is 20315003257. The reversal of 20315003247 is 74230051302.

20315003247 is a `hidden beast` number, since 20 + 315 + 0 + 0 + 324 + 7 = 666.

It is not a de Polignac number, because 20315003247 - 2³ = 20315003239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20315003247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315003227) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14925847 + ... + 14927207.

It is an arithmetic number, because the mean of its divisors is an integer number (275523066).

Almost surely, 2^20315003247 is an apocalyptic number.

20315003247 is a deficient number, since it is larger than the sum of its proper divisors (19360318257).

20315003247 is a wasteful number, since it uses less digits than its factorization.

20315003247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

Adding to 20315003247 its reverse (74230051302), we get a palindrome (94545054549).

The spelling of 20315003247 in words is "twenty billion, three hundred fifteen million, three thousand, two hundred forty-seven".