20757695 has 16 divisors (see below), whose sum is σ = 28574208. Its totient is φ = 14180640.

The previous prime is 20757677. The next prime is 20757721. The reversal of 20757695 is 59675702.

It is not a de Polignac number, because 20757695 - 2¹⁴ = 20741311 is a prime.

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 9932 + ... + 11838.

It is an arithmetic number, because the mean of its divisors is an integer number (1785888).

Almost surely, 2^20757695 is an apocalyptic number.

20757695 is a deficient number, since it is larger than the sum of its proper divisors (7816513).

20757695 is a wasteful number, since it uses less digits than its factorization.

20757695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 20757695 is about 4556.0613472604. The cubic root of 20757695 is about 274.8271972231.

The spelling of 20757695 in words is "twenty million, seven hundred fifty-seven thousand, six hundred ninety-five".