20695129 has 8 divisors (see below), whose sum is σ = 25471040. Its totient is φ = 16374096.

The previous prime is 20695127. The next prime is 20695133. The reversal of 20695129 is 92159602.

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 20695129 - 2¹ = 20695127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20695094 and 20695103.

It is not an unprimeable number, because it can be changed into a prime (20695121) 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 7 ways as a sum of consecutive naturals, for example, 113619 + ... + 113800.

It is an arithmetic number, because the mean of its divisors is an integer number (3183880).

Almost surely, 2^20695129 is an apocalyptic number.

It is an amenable number.

20695129 is a deficient number, since it is larger than the sum of its proper divisors (4775911).

20695129 is a wasteful number, since it uses less digits than its factorization.

20695129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227439.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 20695129 is about 4549.1899278883. The cubic root of 20695129 is about 274.5507994322.

The spelling of 20695129 in words is "twenty million, six hundred ninety-five thousand, one hundred twenty-nine".