13851020 has 48 divisors (see below), whose sum is σ = 30209760. Its totient is φ = 5331456.

The previous prime is 13850999. The next prime is 13851029. The reversal of 13851020 is 2015831.

13851020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13850983 and 13851001.

It is not an unprimeable number, because it can be changed into a prime (13851029) 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, 77291 + ... + 77469.

It is an arithmetic number, because the mean of its divisors is an integer number (629370).

Almost surely, 2^13851020 is an apocalyptic number.

13851020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13851020 is an abundant number, since it is smaller than the sum of its proper divisors (16358740).

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

13851020 is a wasteful number, since it uses less digits than its factorization.

13851020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 13851020 is about 3721.6958500125. The cubic root of 13851020 is about 240.1562639752.

Adding to 13851020 its reverse (2015831), we get a palindrome (15866851).

The spelling of 13851020 in words is "thirteen million, eight hundred fifty-one thousand, twenty".