20442140012 has 12 divisors (see below), whose sum is σ = 40884280080. Its totient is φ = 8760917136.

The previous prime is 20442140009. The next prime is 20442140029. The reversal of 20442140012 is 21004124402.

20442140012 is an admirable number.

It is a super-2 number, since 2×20442140012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365038187 + ... + 365038242.

It is an arithmetic number, because the mean of its divisors is an integer number (3407023340).

Almost surely, 2^20442140012 is an apocalyptic number.

It is an amenable number.

20442140012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20442140012 is a wasteful number, since it uses less digits than its factorization.

20442140012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730076440 (or 730076438 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20442140012 its reverse (21004124402), we get a palindrome (41446264414).

The spelling of 20442140012 in words is "twenty billion, four hundred forty-two million, one hundred forty thousand, twelve".