20012311332 has 60 divisors (see below), whose sum is σ = 56340464796. Its totient is φ = 6157632960.

The previous prime is 20012311331. The next prime is 20012311343. The reversal of 20012311332 is 23311321002.

20012311332 is a `hidden beast` number, since 20 + 0 + 1 + 2 + 311 + 332 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8204011776 + 11808299556 = 90576^2 + 108666^2 .

It is a super-2 number, since 2×20012311332² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20012311331) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2371419 + ... + 2379842.

Almost surely, 2^20012311332 is an apocalyptic number.

It is an amenable number.

20012311332 is an abundant number, since it is smaller than the sum of its proper divisors (36328153464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20012311332 is a wasteful number, since it uses less digits than its factorization.

20012311332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751290 (or 4751279 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20012311332 its reverse (23311321002), we get a palindrome (43323632334).

The spelling of 20012311332 in words is "twenty billion, twelve million, three hundred eleven thousand, three hundred thirty-two".