13545620 has 48 divisors (see below), whose sum is σ = 32393088. Its totient is φ = 4709760.

The previous prime is 13545619. The next prime is 13545629. The reversal of 13545620 is 2654531.

13545620 = T₁₆₅ + T₁₆₆ + ... + T₄₄₀.

It is a self number, because there is not a number n which added to its sum of digits gives 13545620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13545629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3722 + ... + 6398.

It is an arithmetic number, because the mean of its divisors is an integer number (674856).

Almost surely, 2^13545620 is an apocalyptic number.

13545620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13545620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16196544).

13545620 is an abundant number, since it is smaller than the sum of its proper divisors (18847468).

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

13545620 is a wasteful number, since it uses less digits than its factorization.

13545620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 13545620 is about 3680.4374739968. The cubic root of 13545620 is about 238.3780682270.

The spelling of 13545620 in words is "thirteen million, five hundred forty-five thousand, six hundred twenty".