20072669 has 4 divisors (see below), whose sum is σ = 20764860. Its totient is φ = 19380480.

The previous prime is 20072651. The next prime is 20072681. The reversal of 20072669 is 96627002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16605625 + 3467044 = 4075^2 + 1862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20072669 is a prime.

It is a super-2 number, since 2×20072669² = 805824081567122, 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 (20072069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346052 + ... + 346109.

It is an arithmetic number, because the mean of its divisors is an integer number (5191215).

Almost surely, 2^20072669 is an apocalyptic number.

20072669 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20072669 is a deficient number, since it is larger than the sum of its proper divisors (692191).

20072669 is an equidigital number, since it uses as much as digits as its factorization.

20072669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692190.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20072669 is about 4480.2532294503. The cubic root of 20072669 is about 271.7701209773.

The spelling of 20072669 in words is "twenty million, seventy-two thousand, six hundred sixty-nine".