20731263207 has 32 divisors (see below), whose sum is σ = 30078358272. Its totient is φ = 12648006144.

The previous prime is 20731263169. The next prime is 20731263209. The reversal of 20731263207 is 70236213702.

It is not a de Polignac number, because 20731263207 - 2¹⁶ = 20731197671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731263209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4154568 + ... + 4159554.

It is an arithmetic number, because the mean of its divisors is an integer number (939948696).

Almost surely, 2^20731263207 is an apocalyptic number.

20731263207 is a deficient number, since it is larger than the sum of its proper divisors (9347095065).

20731263207 is a wasteful number, since it uses less digits than its factorization.

20731263207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7247.

The product of its (nonzero) digits is 21168, while the sum is 33.

Adding to 20731263207 its reverse (70236213702), we get a palindrome (90967476909).

The spelling of 20731263207 in words is "twenty billion, seven hundred thirty-one million, two hundred sixty-three thousand, two hundred seven".