20402224140 has 48 divisors (see below), whose sum is σ = 57261990240. Its totient is φ = 5427663360.

The previous prime is 20402224133. The next prime is 20402224181. The reversal of 20402224140 is 4142220402.

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 15 ways as a sum of consecutive naturals, for example, 378585 + ... + 429104.

It is an arithmetic number, because the mean of its divisors is an integer number (1192958130).

Almost surely, 2^20402224140 is an apocalyptic number.

20402224140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402224140 is an abundant number, since it is smaller than the sum of its proper divisors (36859766100).

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

20402224140 is a wasteful number, since it uses less digits than its factorization.

20402224140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808122 (or 808120 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 20402224140 its reverse (4142220402), we get a palindrome (24544444542).

The spelling of 20402224140 in words is "twenty billion, four hundred two million, two hundred twenty-four thousand, one hundred forty".