20915083 has 8 divisors (see below), whose sum is σ = 25309152. Its totient is φ = 16872576.

The previous prime is 20915053. The next prime is 20915107. The reversal of 20915083 is 38051902.

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

It is not a de Polignac number, because 20915083 - 2⁹ = 20914571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20915023) 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, 87760 + ... + 87997.

It is an arithmetic number, because the mean of its divisors is an integer number (3163644).

Almost surely, 2^20915083 is an apocalyptic number.

20915083 is a deficient number, since it is larger than the sum of its proper divisors (4394069).

20915083 is a wasteful number, since it uses less digits than its factorization.

20915083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175781.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20915083 is about 4573.3011053286. The cubic root of 20915083 is about 275.5200429422.

Adding to 20915083 its reverse (38051902), we get a palindrome (58966985).

The spelling of 20915083 in words is "twenty million, nine hundred fifteen thousand, eighty-three".