20402442330 has 64 divisors (see below), whose sum is σ = 51563761920. Its totient is φ = 5156338176.

The previous prime is 20402442323. The next prime is 20402442341. The reversal of 20402442330 is 3324420402.

It is a self number, because there is not a number n which added to its sum of digits gives 20402442330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60427 + ... + 210846.

It is an arithmetic number, because the mean of its divisors is an integer number (805683780).

Almost surely, 2^20402442330 is an apocalyptic number.

20402442330 is an abundant number, since it is smaller than the sum of its proper divisors (31161319590).

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

20402442330 is a wasteful number, since it uses less digits than its factorization.

20402442330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271415.

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20402442330 its reverse (3324420402), we get a palindrome (23726862732).

The spelling of 20402442330 in words is "twenty billion, four hundred two million, four hundred forty-two thousand, three hundred thirty".