20257606669 has 8 divisors (see below), whose sum is σ = 20968796160. Its totient is φ = 19547260656.

The previous prime is 20257606651. The next prime is 20257606697. The reversal of 20257606669 is 96660675202.

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 20257606669 - 2¹¹ = 20257604621 is a prime.

It is a super-2 number, since 2×20257606669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257606639) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 161797 + ... + 258250.

It is an arithmetic number, because the mean of its divisors is an integer number (2621099520).

Almost surely, 2^20257606669 is an apocalyptic number.

20257606669 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20257606669 is a deficient number, since it is larger than the sum of its proper divisors (711189491).

20257606669 is a wasteful number, since it uses less digits than its factorization.

20257606669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421739.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 20257606669 in words is "twenty billion, two hundred fifty-seven million, six hundred six thousand, six hundred sixty-nine".