20798355 has 8 divisors (see below), whose sum is σ = 33277392. Its totient is φ = 11092448.

The previous prime is 20798353. The next prime is 20798359. The reversal of 20798355 is 55389702.

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 20798355 - 2¹ = 20798353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20798353) 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, 693264 + ... + 693293.

It is an arithmetic number, because the mean of its divisors is an integer number (4159674).

Almost surely, 2^20798355 is an apocalyptic number.

20798355 is a deficient number, since it is larger than the sum of its proper divisors (12479037).

20798355 is a wasteful number, since it uses less digits than its factorization.

20798355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386565.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 20798355 is about 4560.5213517755. The cubic root of 20798355 is about 275.0065232612.

The spelling of 20798355 in words is "twenty million, seven hundred ninety-eight thousand, three hundred fifty-five".