20321424040 has 64 divisors (see below), whose sum is σ = 47966256000. Its totient is φ = 7737703680.

The previous prime is 20321424031. The next prime is 20321424077. The reversal of 20321424040 is 4042412302.

It is a happy number.

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, 41010 + ... + 205729.

It is an arithmetic number, because the mean of its divisors is an integer number (749472750).

Almost surely, 2^20321424040 is an apocalyptic number.

20321424040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321424040 is an abundant number, since it is smaller than the sum of its proper divisors (27644831960).

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

20321424040 is a wasteful number, since it uses less digits than its factorization.

20321424040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246850 (or 246846 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20321424040 its reverse (4042412302), we get a palindrome (24363836342).

The spelling of 20321424040 in words is "twenty billion, three hundred twenty-one million, four hundred twenty-four thousand, forty".