13709311820 has 24 divisors (see below), whose sum is σ = 28802272128. Its totient is φ = 5481302400.

The previous prime is 13709311789. The next prime is 13709311823. The reversal of 13709311820 is 2811390731.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13709311823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104636 + ... + 195875.

It is an arithmetic number, because the mean of its divisors is an integer number (1200094672).

Almost surely, 2^13709311820 is an apocalyptic number.

13709311820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13709311820 is an abundant number, since it is smaller than the sum of its proper divisors (15092960308).

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

13709311820 is a wasteful number, since it uses less digits than its factorization.

13709311820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302801 (or 302799 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 13709311820 in words is "thirteen billion, seven hundred nine million, three hundred eleven thousand, eight hundred twenty".