20311203232 has 12 divisors (see below), whose sum is σ = 39987681426. Its totient is φ = 10155601600.

The previous prime is 20311203191. The next prime is 20311203247. The reversal of 20311203232 is 23230211302.

It can be written as a sum of positive squares in only one way, i.e., 19643704336 + 667498896 = 140156^2 + 25836^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317362519 + ... + 317362582.

Almost surely, 2^20311203232 is an apocalyptic number.

It is an amenable number.

20311203232 is a deficient number, since it is larger than the sum of its proper divisors (19676478194).

20311203232 is an equidigital number, since it uses as much as digits as its factorization.

20311203232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634725111 (or 634725103 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20311203232 its reverse (23230211302), we get a palindrome (43541414534).

The spelling of 20311203232 in words is "twenty billion, three hundred eleven million, two hundred three thousand, two hundred thirty-two".