13213764 has 18 divisors (see below), whose sum is σ = 33401550. Its totient is φ = 4404576.

The previous prime is 13213747. The next prime is 13213769. The reversal of 13213764 is 46731231.

It can be written as a sum of positive squares in only one way, i.e., 13176900 + 36864 = 3630^2 + 192^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (13213769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183489 + ... + 183560.

Almost surely, 2^13213764 is an apocalyptic number.

It is an amenable number.

13213764 is an abundant number, since it is smaller than the sum of its proper divisors (20187786).

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

13213764 is a wasteful number, since it uses less digits than its factorization.

13213764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367059 (or 367054 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 13213764 is about 3635.0741395465. The cubic root of 13213764 is about 236.4152652326.

Adding to 13213764 its reverse (46731231), we get a palindrome (59944995).

The spelling of 13213764 in words is "thirteen million, two hundred thirteen thousand, seven hundred sixty-four".