20102443340 has 24 divisors (see below), whose sum is σ = 48245864352. Its totient is φ = 6892266240.

The previous prime is 20102443307. The next prime is 20102443343. The reversal of 20102443340 is 4334420102.

It is not an unprimeable number, because it can be changed into a prime (20102443343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71794301 + ... + 71794580.

It is an arithmetic number, because the mean of its divisors is an integer number (2010244348).

Almost surely, 2^20102443340 is an apocalyptic number.

20102443340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102443340 is an abundant number, since it is smaller than the sum of its proper divisors (28143421012).

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

20102443340 is a wasteful number, since it uses less digits than its factorization.

20102443340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143588897 (or 143588895 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20102443340 its reverse (4334420102), we get a palindrome (24436863442).

The spelling of 20102443340 in words is "twenty billion, one hundred two million, four hundred forty-three thousand, three hundred forty".