13564020 has 48 divisors (see below), whose sum is σ = 39634560. Its totient is φ = 3459456.

The previous prime is 13564013. The next prime is 13564027. The reversal of 13564020 is 2046531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13564013) and next prime (13564027).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13564027) 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, 3535 + ... + 6294.

It is an arithmetic number, because the mean of its divisors is an integer number (825720).

Almost surely, 2^13564020 is an apocalyptic number.

13564020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13564020 is an abundant number, since it is smaller than the sum of its proper divisors (26070540).

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

13564020 is a wasteful number, since it uses less digits than its factorization.

13564020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9864 (or 9862 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13564020 is about 3682.9363285292. The cubic root of 13564020 is about 238.4859548093.

The spelling of 13564020 in words is "thirteen million, five hundred sixty-four thousand, twenty".