20112442493 has 24 divisors (see below), whose sum is σ = 23869536600. Its totient is φ = 16833674880.

The previous prime is 20112442487. The next prime is 20112442513. The reversal of 20112442493 is 39424421102.

It can be written as a sum of positive squares in 4 ways, for example, as 185449924 + 19926992569 = 13618^2 + 141163^2 .

It is not a de Polignac number, because 20112442493 - 2⁸ = 20112442237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112442793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 595463 + ... + 628331.

It is an arithmetic number, because the mean of its divisors is an integer number (994564025).

Almost surely, 2^20112442493 is an apocalyptic number.

It is an amenable number.

20112442493 is a deficient number, since it is larger than the sum of its proper divisors (3757094107).

20112442493 is a wasteful number, since it uses less digits than its factorization.

20112442493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33293 (or 33282 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 20112442493 its reverse (39424421102), we get a palindrome (59536863595).

The spelling of 20112442493 in words is "twenty billion, one hundred twelve million, four hundred forty-two thousand, four hundred ninety-three".