13918252820 has 12 divisors (see below), whose sum is σ = 29228330964. Its totient is φ = 5567301120.

The previous prime is 13918252811. The next prime is 13918252823. The reversal of 13918252820 is 2825281931.

It can be written as a sum of positive squares in 2 ways, for example, as 7251203716 + 6667049104 = 85154^2 + 81652^2 .

It is a super-2 number, since 2×13918252820² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13918252823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347956301 + ... + 347956340.

It is an arithmetic number, because the mean of its divisors is an integer number (2435694247).

Almost surely, 2^13918252820 is an apocalyptic number.

13918252820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13918252820 is an abundant number, since it is smaller than the sum of its proper divisors (15310078144).

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

13918252820 is a wasteful number, since it uses less digits than its factorization.

13918252820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695912650 (or 695912648 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 13918252820 in words is "thirteen billion, nine hundred eighteen million, two hundred fifty-two thousand, eight hundred twenty".