13652020 has 24 divisors (see below), whose sum is σ = 30356424. Its totient is φ = 5139456.

The previous prime is 13651999. The next prime is 13652029. The reversal of 13652020 is 2025631.

13652020 = 947² + 948² + ... + 961².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3076516 + 10575504 = 1754^2 + 3252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13652029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19737 + ... + 20416.

It is an arithmetic number, because the mean of its divisors is an integer number (1264851).

Almost surely, 2^13652020 is an apocalyptic number.

13652020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13652020 is an abundant number, since it is smaller than the sum of its proper divisors (16704404).

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

13652020 is a wasteful number, since it uses less digits than its factorization.

13652020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40179 (or 40177 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13652020 is about 3694.8640029100. The cubic root of 13652020 is about 239.0005893907. Note that the first 3 decimals are identical.

Adding to 13652020 its reverse (2025631), we get a palindrome (15677651).

The spelling of 13652020 in words is "thirteen million, six hundred fifty-two thousand, twenty".