20130496440 has 64 divisors (see below), whose sum is σ = 61795958400. Its totient is φ = 5243290752.

The previous prime is 20130496403. The next prime is 20130496489. The reversal of 20130496440 is 4469403102.

It is a congruent 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, 1945470 + ... + 1955789.

It is an arithmetic number, because the mean of its divisors is an integer number (965561850).

Almost surely, 2^20130496440 is an apocalyptic number.

20130496440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20130496440 is an abundant number, since it is smaller than the sum of its proper divisors (41665461960).

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

20130496440 is a wasteful number, since it uses less digits than its factorization.

20130496440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901316 (or 3901312 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 20130496440 its reverse (4469403102), we get a palindrome (24599899542).

The spelling of 20130496440 in words is "twenty billion, one hundred thirty million, four hundred ninety-six thousand, four hundred forty".