20239615 has 24 divisors (see below), whose sum is σ = 27242064. Its totient is φ = 14313600.

The previous prime is 20239613. The next prime is 20239619. The reversal of 20239615 is 51693202.

It is not a de Polignac number, because 20239615 - 2¹ = 20239613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20239613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277219 + ... + 277291.

It is an arithmetic number, because the mean of its divisors is an integer number (1135086).

Almost surely, 2^20239615 is an apocalyptic number.

20239615 is a deficient number, since it is larger than the sum of its proper divisors (7002449).

20239615 is an equidigital number, since it uses as much as digits as its factorization.

20239615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 20239615 is about 4498.8459631332. The cubic root of 20239615 is about 272.5214863960.

The spelling of 20239615 in words is "twenty million, two hundred thirty-nine thousand, six hundred fifteen".