20715695 has 32 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 11917440.

The previous prime is 20715691. The next prime is 20715697. The reversal of 20715695 is 59651702.

It is not a de Polignac number, because 20715695 - 2² = 20715691 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20715691) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2936 + ... + 7074.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^20715695 is an apocalyptic number.

20715695 is a deficient number, since it is larger than the sum of its proper divisors (12669265).

20715695 is a wasteful number, since it uses less digits than its factorization.

20715695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 20715695 is about 4551.4497690296. The cubic root of 20715695 is about 274.6417152283.

The spelling of 20715695 in words is "twenty million, seven hundred fifteen thousand, six hundred ninety-five".