20101022442 has 12 divisors (see below), whose sum is σ = 43552215330. Its totient is φ = 6700340808.

The previous prime is 20101022429. The next prime is 20101022443. The reversal of 20101022442 is 24422010102.

20101022442 is a `hidden beast` number, since 201 + 0 + 1 + 0 + 22 + 442 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15301442601 + 4799579841 = 123699^2 + 69279^2 .

It is a super-2 number, since 2×20101022442² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1116723469 = 20101022442 / (2 + 0 + 1 + 0 + 1 + 0 + 2 + 2 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (20101022443) 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 5 ways as a sum of consecutive naturals, for example, 558361717 + ... + 558361752.

Almost surely, 2^20101022442 is an apocalyptic number.

20101022442 is an abundant number, since it is smaller than the sum of its proper divisors (23451192888).

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

20101022442 is a wasteful number, since it uses less digits than its factorization.

20101022442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116723477 (or 1116723474 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20101022442 its reverse (24422010102), we get a palindrome (44523032544).

The spelling of 20101022442 in words is "twenty billion, one hundred one million, twenty-two thousand, four hundred forty-two".