20540040424 has 64 divisors (see below), whose sum is σ = 42778886400. Its totient is φ = 9201024000.

The previous prime is 20540040403. The next prime is 20540040427. The reversal of 20540040424 is 42404004502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20540040427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243349 + ... + 316699.

It is an arithmetic number, because the mean of its divisors is an integer number (668420100).

Almost surely, 2^20540040424 is an apocalyptic number.

It is an amenable number.

20540040424 is an abundant number, since it is smaller than the sum of its proper divisors (22238845976).

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

20540040424 is a wasteful number, since it uses less digits than its factorization.

20540040424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73474 (or 73470 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 20540040424 its reverse (42404004502), we get a palindrome (62944044926).

The spelling of 20540040424 in words is "twenty billion, five hundred forty million, forty thousand, four hundred twenty-four".