20797355 has 4 divisors (see below), whose sum is σ = 24956832. Its totient is φ = 16637880.

The previous prime is 20797351. The next prime is 20797363. The reversal of 20797355 is 55379702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20797355 - 2² = 20797351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20797351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2079731 + ... + 2079740.

It is an arithmetic number, because the mean of its divisors is an integer number (6239208).

Almost surely, 2^20797355 is an apocalyptic number.

20797355 is a deficient number, since it is larger than the sum of its proper divisors (4159477).

20797355 is an equidigital number, since it uses as much as digits as its factorization.

20797355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159476.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 20797355 is about 4560.4117138697. The cubic root of 20797355 is about 275.0021156862.

The spelling of 20797355 in words is "twenty million, seven hundred ninety-seven thousand, three hundred fifty-five".