13653820 has 24 divisors (see below), whose sum is σ = 29374128. Its totient is φ = 5328000.

The previous prime is 13653811. The next prime is 13653859. The reversal of 13653820 is 2835631.

13653820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7506 + ... + 9145.

It is an arithmetic number, because the mean of its divisors is an integer number (1223922).

Almost surely, 2^13653820 is an apocalyptic number.

13653820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13653820 is an abundant number, since it is smaller than the sum of its proper divisors (15720308).

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

13653820 is a wasteful number, since it uses less digits than its factorization.

13653820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16701 (or 16699 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 13653820 is about 3695.1075762419. The cubic root of 13653820 is about 239.0110928950.

It can be divided in two parts, 136 and 53820, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 13653820 in words is "thirteen million, six hundred fifty-three thousand, eight hundred twenty".