20040420034024 has 64 divisors (see below), whose sum is σ = 40914717681600. Its totient is φ = 9147059841024.

The previous prime is 20040420034009. The next prime is 20040420034051. The reversal of 20040420034024 is 42043002404002.

It is a super-2 number, since 2×20040420034024² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20040420034024.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12425047 + ... + 13944985.

It is an arithmetic number, because the mean of its divisors is an integer number (639292463775).

Almost surely, 2^{20040420034024} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20040420034024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20457358840800).

20040420034024 is an abundant number, since it is smaller than the sum of its proper divisors (20874297647576).

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

20040420034024 is a wasteful number, since it uses less digits than its factorization.

20040420034024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521362 (or 1521358 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 20040420034024 its reverse (42043002404002), we get a palindrome (62083422438026).

The spelling of 20040420034024 in words is "twenty trillion, forty billion, four hundred twenty million, thirty-four thousand, twenty-four".