20015432 has 16 divisors (see below), whose sum is σ = 38044140. Its totient is φ = 9870336.

The previous prime is 20015431. The next prime is 20015447. The reversal of 20015432 is 23451002.

It can be written as a sum of positive squares in 2 ways, for example, as 18541636 + 1473796 = 4306^2 + 1214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20015432.

It is not an unprimeable number, because it can be changed into a prime (20015431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16553 + ... + 17720.

Almost surely, 2^20015432 is an apocalyptic number.

It is an amenable number.

20015432 is a deficient number, since it is larger than the sum of its proper divisors (18028708).

20015432 is a wasteful number, since it uses less digits than its factorization.

20015432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34352 (or 34348 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20015432 is about 4473.8609723593. The cubic root of 20015432 is about 271.5115585319.

Adding to 20015432 its reverse (23451002), we get a palindrome (43466434).

The spelling of 20015432 in words is "twenty million, fifteen thousand, four hundred thirty-two".