20432115 has 32 divisors (see below), whose sum is σ = 39628800. Its totient is φ = 9905760.

The previous prime is 20432107. The next prime is 20432117. The reversal of 20432115 is 51123402.

It is not a de Polignac number, because 20432115 - 2³ = 20432107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20432117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5395 + ... + 8364.

It is an arithmetic number, because the mean of its divisors is an integer number (1238400).

Almost surely, 2^20432115 is an apocalyptic number.

20432115 is a deficient number, since it is larger than the sum of its proper divisors (19196685).

20432115 is a wasteful number, since it uses less digits than its factorization.

20432115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13784 (or 13778 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20432115 is about 4520.1897084083. The cubic root of 20432115 is about 273.3827501703.

Adding to 20432115 its reverse (51123402), we get a palindrome (71555517).

The spelling of 20432115 in words is "twenty million, four hundred thirty-two thousand, one hundred fifteen".