20690134 has 8 divisors (see below), whose sum is σ = 31056480. Its totient is φ = 10337976.

The previous prime is 20690099. The next prime is 20690143. The reversal of 20690134 is 43109602.

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 = 20690099 and 20690108.

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, 1587 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (3882060).

Almost surely, 2^20690134 is an apocalyptic number.

20690134 is a deficient number, since it is larger than the sum of its proper divisors (10366346).

20690134 is a wasteful number, since it uses less digits than its factorization.

20690134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7094.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20690134 is about 4548.6408959161. The cubic root of 20690134 is about 274.5287090233.

Adding to 20690134 its reverse (43109602), we get a palindrome (63799736).

The spelling of 20690134 in words is "twenty million, six hundred ninety thousand, one hundred thirty-four".