20053915 has 8 divisors (see below), whose sum is σ = 27502560. Its totient is φ = 13751232.

The previous prime is 20053883. The next prime is 20053927. The reversal of 20053915 is 51935002.

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 20053915 - 2⁵ = 20053883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20053915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286450 + ... + 286519.

It is an arithmetic number, because the mean of its divisors is an integer number (3437820).

Almost surely, 2^20053915 is an apocalyptic number.

20053915 is a deficient number, since it is larger than the sum of its proper divisors (7448645).

20053915 is an equidigital number, since it uses as much as digits as its factorization.

20053915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572981.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 20053915 is about 4478.1597783018. The cubic root of 20053915 is about 271.6854558540.

Adding to 20053915 its reverse (51935002), we get a palindrome (71988917).

The spelling of 20053915 in words is "twenty million, fifty-three thousand, nine hundred fifteen".