20530112240 has 80 divisors (see below), whose sum is σ = 52100102880. Its totient is φ = 7461442560.

The previous prime is 20530112233. The next prime is 20530112249. The reversal of 20530112240 is 4221103502.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530112249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1963346 + ... + 1973774.

It is an arithmetic number, because the mean of its divisors is an integer number (651251286).

Almost surely, 2^20530112240 is an apocalyptic number.

20530112240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20530112240 is an abundant number, since it is smaller than the sum of its proper divisors (31569990640).

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

20530112240 is a wasteful number, since it uses less digits than its factorization.

20530112240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12690 (or 12684 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20530112240 its reverse (4221103502), we get a palindrome (24751215742).

The spelling of 20530112240 in words is "twenty billion, five hundred thirty million, one hundred twelve thousand, two hundred forty".