20694669 has 8 divisors (see below), whose sum is σ = 27724512. Its totient is φ = 13730640.

The previous prime is 20694647. The next prime is 20694671. The reversal of 20694669 is 96649602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20694669 - 2⁵ = 20694637 is a prime.

It is a super-2 number, since 2×20694669² = 856538650039122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20694669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20694679) 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, 15714 + ... + 16979.

It is an arithmetic number, because the mean of its divisors is an integer number (3465564).

Almost surely, 2^20694669 is an apocalyptic number.

It is an amenable number.

20694669 is a deficient number, since it is larger than the sum of its proper divisors (7029843).

20694669 is a wasteful number, since it uses less digits than its factorization.

20694669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32907.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 20694669 is about 4549.1393691554. The cubic root of 20694669 is about 274.5487652289.

The spelling of 20694669 in words is "twenty million, six hundred ninety-four thousand, six hundred sixty-nine".