20689126 has 8 divisors (see below), whose sum is σ = 31542624. Its totient is φ = 10174920.

The previous prime is 20689111. The next prime is 20689139. The reversal of 20689126 is 62198602.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20689091 and 20689100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84670 + ... + 84913.

It is an arithmetic number, because the mean of its divisors is an integer number (3942828).

Almost surely, 2^20689126 is an apocalyptic number.

20689126 is a deficient number, since it is larger than the sum of its proper divisors (10853498).

20689126 is a wasteful number, since it uses less digits than its factorization.

20689126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169646.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 20689126 is about 4548.5300922386. The cubic root of 20689126 is about 274.5242507078.

The spelling of 20689126 in words is "twenty million, six hundred eighty-nine thousand, one hundred twenty-six".