20122320042 has 24 divisors (see below), whose sum is σ = 47561847840. Its totient is φ = 6097672680.

The previous prime is 20122320041. The next prime is 20122320061. The reversal of 20122320042 is 24002322102.

20122320042 is a `hidden beast` number, since 201 + 223 + 200 + 42 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20122319997 and 20122320024.

It is not an unprimeable number, because it can be changed into a prime (20122320041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50813742 + ... + 50814137.

It is an arithmetic number, because the mean of its divisors is an integer number (1981743660).

Almost surely, 2^20122320042 is an apocalyptic number.

20122320042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20122320042 is an abundant number, since it is smaller than the sum of its proper divisors (27439527798).

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

20122320042 is a wasteful number, since it uses less digits than its factorization.

20122320042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101627898 (or 101627895 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20122320042 its reverse (24002322102), we get a palindrome (44124642144).

The spelling of 20122320042 in words is "twenty billion, one hundred twenty-two million, three hundred twenty thousand, forty-two".