20690035 has 8 divisors (see below), whose sum is σ = 25433856. Its totient is φ = 16148160.

The previous prime is 20690029. The next prime is 20690057. The reversal of 20690035 is 53009602.

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

It is not a de Polignac number, because 20690035 - 2⁹ = 20689523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20689991 and 20690009.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50259 + ... + 50668.

It is an arithmetic number, because the mean of its divisors is an integer number (3179232).

Almost surely, 2^20690035 is an apocalyptic number.

20690035 is a deficient number, since it is larger than the sum of its proper divisors (4743821).

20690035 is a wasteful number, since it uses less digits than its factorization.

20690035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100973.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 20690035 is about 4548.6300135315. The cubic root of 20690035 is about 274.5282711594.

Adding to 20690035 its reverse (53009602), we get a palindrome (73699637).

The spelling of 20690035 in words is "twenty million, six hundred ninety thousand, thirty-five".