20112324140 has 48 divisors (see below), whose sum is σ = 42378336000. Its totient is φ = 8017851072.

The previous prime is 20112324103. The next prime is 20112324143. The reversal of 20112324140 is 4142321102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20112324143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9580811 + ... + 9582909.

It is an arithmetic number, because the mean of its divisors is an integer number (882882000).

Almost surely, 2^20112324140 is an apocalyptic number.

20112324140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112324140 is an abundant number, since it is smaller than the sum of its proper divisors (22266011860).

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

20112324140 is a wasteful number, since it uses less digits than its factorization.

20112324140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3494 (or 3492 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20112324140 its reverse (4142321102), we get a palindrome (24254645242).

The spelling of 20112324140 in words is "twenty billion, one hundred twelve million, three hundred twenty-four thousand, one hundred forty".