13905020 has 24 divisors (see below), whose sum is σ = 29332800. Its totient is φ = 5536832.

The previous prime is 13904987. The next prime is 13905037. The reversal of 13905020 is 2050931.

13905020 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 = 13904983 and 13905001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3326 + ... + 6234.

It is an arithmetic number, because the mean of its divisors is an integer number (1222200).

Almost surely, 2^13905020 is an apocalyptic number.

13905020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13905020 is an abundant number, since it is smaller than the sum of its proper divisors (15427780).

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

13905020 is a wasteful number, since it uses less digits than its factorization.

13905020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157 (or 3155 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 13905020 is about 3728.9435501225. The cubic root of 13905020 is about 240.4679527321.

Adding to 13905020 its reverse (2050931), we get a palindrome (15955951).

The spelling of 13905020 in words is "thirteen million, nine hundred five thousand, twenty".