20331240424 has 32 divisors (see below), whose sum is σ = 43020655200. Its totient is φ = 8922800320.

The previous prime is 20331240343. The next prime is 20331240443. The reversal of 20331240424 is 42404213302.

It is a happy number.

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, 3980842 + ... + 3985945.

It is an arithmetic number, because the mean of its divisors is an integer number (1344395475).

Almost surely, 2^20331240424 is an apocalyptic number.

It is an amenable number.

20331240424 is an abundant number, since it is smaller than the sum of its proper divisors (22689414776).

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

20331240424 is a wasteful number, since it uses less digits than its factorization.

20331240424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7966833 (or 7966829 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20331240424 its reverse (42404213302), we get a palindrome (62735453726).

The spelling of 20331240424 in words is "twenty billion, three hundred thirty-one million, two hundred forty thousand, four hundred twenty-four".