20617490029 has 8 divisors (see below), whose sum is σ = 20699602560. Its totient is φ = 20535422400.

The previous prime is 20617489967. The next prime is 20617490041. The reversal of 20617490029 is 92009471602.

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-20617490029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20617489973 and 20617490000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20617490629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140342 + ... + 1158280.

It is an arithmetic number, because the mean of its divisors is an integer number (2587450320).

Almost surely, 2^20617490029 is an apocalyptic number.

It is an amenable number.

20617490029 is a deficient number, since it is larger than the sum of its proper divisors (82112531).

20617490029 is a wasteful number, since it uses less digits than its factorization.

20617490029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22451.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 20617490029 in words is "twenty billion, six hundred seventeen million, four hundred ninety thousand, twenty-nine".