20638115 has 8 divisors (see below), whose sum is σ = 24838800. Its totient is φ = 16461792.

The previous prime is 20638109. The next prime is 20638127. The reversal of 20638115 is 51183602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20638115 - 2⁴ = 20638099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4169 + ... + 7658.

It is an arithmetic number, because the mean of its divisors is an integer number (3104850).

Almost surely, 2^20638115 is an apocalyptic number.

20638115 is a deficient number, since it is larger than the sum of its proper divisors (4200685).

20638115 is a wasteful number, since it uses less digits than its factorization.

20638115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12181.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20638115 is about 4542.9192156586. The cubic root of 20638115 is about 274.2984431743.

The spelling of 20638115 in words is "twenty million, six hundred thirty-eight thousand, one hundred fifteen".