13887700820 has 48 divisors (see below), whose sum is σ = 33799949568. Its totient is φ = 4694430720.

The previous prime is 13887700789. The next prime is 13887700829. The reversal of 13887700820 is 2800778831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887700829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688637 + ... + 708516.

It is an arithmetic number, because the mean of its divisors is an integer number (704165616).

Almost surely, 2^13887700820 is an apocalyptic number.

13887700820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13887700820 is an abundant number, since it is smaller than the sum of its proper divisors (19912248748).

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

13887700820 is a wasteful number, since it uses less digits than its factorization.

13887700820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397240 (or 1397238 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 13887700820 in words is "thirteen billion, eight hundred eighty-seven million, seven hundred thousand, eight hundred twenty".