20005442140 has 24 divisors (see below), whose sum is σ = 42222549600. Its totient is φ = 7961963328.

The previous prime is 20005442131. The next prime is 20005442141. The reversal of 20005442140 is 4124450002.

It is a happy number.

It is a super-3 number, since 3×20005442140³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005442141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2509267 + ... + 2517226.

It is an arithmetic number, because the mean of its divisors is an integer number (1759272900).

Almost surely, 2^20005442140 is an apocalyptic number.

20005442140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20005442140 is an abundant number, since it is smaller than the sum of its proper divisors (22217107460).

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

20005442140 is a wasteful number, since it uses less digits than its factorization.

20005442140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026701 (or 5026699 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 20005442140 its reverse (4124450002), we get a palindrome (24129892142).

The spelling of 20005442140 in words is "twenty billion, five million, four hundred forty-two thousand, one hundred forty".