20820693 has 8 divisors (see below), whose sum is σ = 27820800. Its totient is φ = 13850528.

The previous prime is 20820691. The next prime is 20820697. The reversal of 20820693 is 39602802.

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 20820693 - 2¹ = 20820691 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20820693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20820691) 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, 5808 + ... + 8681.

It is an arithmetic number, because the mean of its divisors is an integer number (3477600).

Almost surely, 2^20820693 is an apocalyptic number.

It is an amenable number.

20820693 is a deficient number, since it is larger than the sum of its proper divisors (7000107).

20820693 is a wasteful number, since it uses less digits than its factorization.

20820693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14971.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20820693 is about 4562.9697566388. The cubic root of 20820693 is about 275.1049428677.

The spelling of 20820693 in words is "twenty million, eight hundred twenty thousand, six hundred ninety-three".