20541235040 has 24 divisors (see below), whose sum is σ = 48528668160. Its totient is φ = 8216493952.

The previous prime is 20541235009. The next prime is 20541235067. The reversal of 20541235040 is 4053214502.

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 3 ways as a sum of consecutive naturals, for example, 64191200 + ... + 64191519.

It is an arithmetic number, because the mean of its divisors is an integer number (2022027840).

Almost surely, 2^20541235040 is an apocalyptic number.

20541235040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20541235040 is an abundant number, since it is smaller than the sum of its proper divisors (27987433120).

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

20541235040 is a wasteful number, since it uses less digits than its factorization.

20541235040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128382734 (or 128382726 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20541235040 its reverse (4053214502), we get a palindrome (24594449542).

The spelling of 20541235040 in words is "twenty billion, five hundred forty-one million, two hundred thirty-five thousand, forty".