20735669 has 8 divisors (see below), whose sum is σ = 22186080. Its totient is φ = 19321200.

The previous prime is 20735657. The next prime is 20735677. The reversal of 20735669 is 96653702.

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 20735669 - 2⁴ = 20735653 is a prime.

It is a super-2 number, since 2×20735669² = 859935937755122, which 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 (20735639) 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, 7787 + ... + 10104.

It is an arithmetic number, because the mean of its divisors is an integer number (2773260).

Almost surely, 2^20735669 is an apocalyptic number.

It is an amenable number.

20735669 is a deficient number, since it is larger than the sum of its proper divisors (1450411).

20735669 is a wasteful number, since it uses less digits than its factorization.

20735669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17971.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 20735669 is about 4553.6434862646. The cubic root of 20735669 is about 274.7299563979.

The spelling of 20735669 in words is "twenty million, seven hundred thirty-five thousand, six hundred sixty-nine".