20111324040 has 96 divisors (see below), whose sum is σ = 65961581400. Its totient is φ = 5313807360.

The previous prime is 20111324027. The next prime is 20111324053. The reversal of 20111324040 is 4042311102.

It is an interprime number because it is at equal distance from previous prime (20111324027) and next prime (20111324053).

It can be written as a sum of positive squares in 4 ways, for example, as 20103269796 + 8054244 = 141786^2 + 2838^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217021 + ... + 295500.

Almost surely, 2^20111324040 is an apocalyptic number.

20111324040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111324040 is an abundant number, since it is smaller than the sum of its proper divisors (45850257360).

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

20111324040 is a wasteful number, since it uses less digits than its factorization.

20111324040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512647 (or 512640 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20111324040 its reverse (4042311102), we get a palindrome (24153635142).

The spelling of 20111324040 in words is "twenty billion, one hundred eleven million, three hundred twenty-four thousand, forty".