20420020242040 has 32 divisors (see below), whose sum is σ = 45949820914080. Its totient is φ = 8167159142272.

The previous prime is 20420020242023. The next prime is 20420020242107. The reversal of 20420020242040 is 4024202002402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26140099 + ... + 26909938.

It is an arithmetic number, because the mean of its divisors is an integer number (1435931903565).

Almost surely, 2^{20420020242040} is an apocalyptic number.

20420020242040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420020242040 is an abundant number, since it is smaller than the sum of its proper divisors (25529800672040).

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

20420020242040 is a wasteful number, since it uses less digits than its factorization.

20420020242040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53059671 (or 53059667 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20420020242040 its reverse (4024202002402), we get a palindrome (24444222244442).

The spelling of 20420020242040 in words is "twenty trillion, four hundred twenty billion, twenty million, two hundred forty-two thousand, forty".