20692669 has 8 divisors (see below), whose sum is σ = 20999000. Its totient is φ = 20388672.

The previous prime is 20692667. The next prime is 20692681. The reversal of 20692669 is 96629602.

It can be written as a sum of positive squares in 4 ways, for example, as 10484644 + 10208025 = 3238^2 + 3195^2 .

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 20692669 - 2¹ = 20692667 is a prime.

It is a super-2 number, since 2×20692669² = 856373100687122, 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 (20692667) 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, 24547 + ... + 25375.

It is an arithmetic number, because the mean of its divisors is an integer number (2624875).

Almost surely, 2^20692669 is an apocalyptic number.

It is an amenable number.

20692669 is a deficient number, since it is larger than the sum of its proper divisors (306331).

20692669 is a wasteful number, since it uses less digits than its factorization.

20692669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 20692669 is about 4548.9195420451. The cubic root of 20692669 is about 274.5399205159.

The spelling of 20692669 in words is "twenty million, six hundred ninety-two thousand, six hundred sixty-nine".