20442240423 has 24 divisors (see below), whose sum is σ = 32619774720. Its totient is φ = 12232406160.

The previous prime is 20442240419. The next prime is 20442240433. The reversal of 20442240423 is 32404224402.

It is not a de Polignac number, because 20442240423 - 2² = 20442240419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442240433) 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, 1299061 + ... + 1314702.

It is an arithmetic number, because the mean of its divisors is an integer number (1359157280).

Almost surely, 2^20442240423 is an apocalyptic number.

20442240423 is a deficient number, since it is larger than the sum of its proper divisors (12177534297).

20442240423 is a wasteful number, since it uses less digits than its factorization.

20442240423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613859 (or 2613856 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 20442240423 its reverse (32404224402), we get a palindrome (52846464825).

The spelling of 20442240423 in words is "twenty billion, four hundred forty-two million, two hundred forty thousand, four hundred twenty-three".