20380532 has 6 divisors (see below), whose sum is σ = 35665938. Its totient is φ = 10190264.

The previous prime is 20380489. The next prime is 20380537. The reversal of 20380532 is 23508302.

It can be written as a sum of positive squares in only one way, i.e., 19307236 + 1073296 = 4394^2 + 1036^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20380498 and 20380507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2547563 + ... + 2547570.

It is an arithmetic number, because the mean of its divisors is an integer number (5944323).

Almost surely, 2^20380532 is an apocalyptic number.

It is an amenable number.

20380532 is a deficient number, since it is larger than the sum of its proper divisors (15285406).

20380532 is a wasteful number, since it uses less digits than its factorization.

20380532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095137 (or 5095135 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20380532 is about 4514.4802580142. The cubic root of 20380532 is about 273.1524952290.

Adding to 20380532 its reverse (23508302), we get a palindrome (43888834).

The spelling of 20380532 in words is "twenty million, three hundred eighty thousand, five hundred thirty-two".