20475715 has 8 divisors (see below), whose sum is σ = 26461008. Its totient is φ = 15120480.

The previous prime is 20475709. The next prime is 20475731. The reversal of 20475715 is 51757402.

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

It is not a de Polignac number, because 20475715 - 2⁵ = 20475683 is a prime.

It is a super-2 number, since 2×20475715² = 838509809522450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157441 + ... + 157570.

It is an arithmetic number, because the mean of its divisors is an integer number (3307626).

Almost surely, 2^20475715 is an apocalyptic number.

20475715 is a deficient number, since it is larger than the sum of its proper divisors (5985293).

20475715 is a wasteful number, since it uses less digits than its factorization.

20475715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315029.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 20475715 is about 4525.0099447405. The cubic root of 20475715 is about 273.5770687651.

The spelling of 20475715 in words is "twenty million, four hundred seventy-five thousand, seven hundred fifteen".