20413240040 has 32 divisors (see below), whose sum is σ = 46005511680. Its totient is φ = 8151834432.

The previous prime is 20413240037. The next prime is 20413240061. The reversal of 20413240040 is 4004231402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20413239994 and 20413240021.

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, 396092 + ... + 444651.

It is an arithmetic number, because the mean of its divisors is an integer number (1437672240).

Almost surely, 2^20413240040 is an apocalyptic number.

20413240040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20413240040 is an abundant number, since it is smaller than the sum of its proper divisors (25592271640).

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

20413240040 is a wasteful number, since it uses less digits than its factorization.

20413240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841361 (or 841357 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20413240040 its reverse (4004231402), we get a palindrome (24417471442).

The spelling of 20413240040 in words is "twenty billion, four hundred thirteen million, two hundred forty thousand, forty".