13923820 has 24 divisors (see below), whose sum is σ = 29310624. Its totient is φ = 5556096.

The previous prime is 13923779. The next prime is 13923821. The reversal of 13923820 is 2832931.

It is not an unprimeable number, because it can be changed into a prime (13923821) 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, 14392 + ... + 15328.

It is an arithmetic number, because the mean of its divisors is an integer number (1221276).

Almost surely, 2^13923820 is an apocalyptic number.

13923820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13923820 is an abundant number, since it is smaller than the sum of its proper divisors (15386804).

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

13923820 is a wasteful number, since it uses less digits than its factorization.

13923820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13923820 is about 3731.4635198538. The cubic root of 13923820 is about 240.5762771986.

The spelling of 13923820 in words is "thirteen million, nine hundred twenty-three thousand, eight hundred twenty".