20775029 has 8 divisors (see below), whose sum is σ = 22781088. Its totient is φ = 18788560.

The previous prime is 20775011. The next prime is 20775031. The reversal of 20775029 is 92057702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20775029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20774986 and 20775004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2627 + ... + 6960.

It is an arithmetic number, because the mean of its divisors is an integer number (2847636).

Almost surely, 2^20775029 is an apocalyptic number.

It is an amenable number.

20775029 is a deficient number, since it is larger than the sum of its proper divisors (2006059).

20775029 is a wasteful number, since it uses less digits than its factorization.

20775029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9795.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 20775029 is about 4557.9632512779. The cubic root of 20775029 is about 274.9036753551.

The spelling of 20775029 in words is "twenty million, seven hundred seventy-five thousand, twenty-nine".