20432516 has 24 divisors (see below), whose sum is σ = 38630424. Its totient is φ = 9400320.

The previous prime is 20432513. The next prime is 20432527. The reversal of 20432516 is 61523402.

It can be written as a sum of positive squares in 4 ways, for example, as 92416 + 20340100 = 304^2 + 4510^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20432491 and 20432500.

It is not an unprimeable number, because it can be changed into a prime (20432513) 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, 31556 + ... + 32196.

It is an arithmetic number, because the mean of its divisors is an integer number (1609601).

Almost surely, 2^20432516 is an apocalyptic number.

20432516 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20432516 is a deficient number, since it is larger than the sum of its proper divisors (18197908).

20432516 is a wasteful number, since it uses less digits than its factorization.

20432516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1269 counting only the distinct ones).

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

The square root of 20432516 is about 4520.2340647360. The cubic root of 20432516 is about 273.3845386254.

Adding to 20432516 its reverse (61523402), we get a palindrome (81955918).

The spelling of 20432516 in words is "twenty million, four hundred thirty-two thousand, five hundred sixteen".