20071669 has 8 divisors (see below), whose sum is σ = 20599040. Its totient is φ = 19547136.

The previous prime is 20071651. The next prime is 20071687. The reversal of 20071669 is 96617002.

It is an interprime number because it is at equal distance from previous prime (20071651) and next prime (20071687).

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 20071669 - 2⁵ = 20071637 is a prime.

It is a super-2 number, since 2×20071669² = 805743792891122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20071669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071699) 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, 25717 + ... + 26485.

It is an arithmetic number, because the mean of its divisors is an integer number (2574880).

Almost surely, 2^20071669 is an apocalyptic number.

It is an amenable number.

20071669 is a deficient number, since it is larger than the sum of its proper divisors (527371).

20071669 is an equidigital number, since it uses as much as digits as its factorization.

20071669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 20071669 is about 4480.1416272256. The cubic root of 20071669 is about 271.7656077984.

The spelling of 20071669 in words is "twenty million, seventy-one thousand, six hundred sixty-nine".