20172353 has 8 divisors (see below), whose sum is σ = 21814272. Its totient is φ = 18581056.

The previous prime is 20172349. The next prime is 20172359. The reversal of 20172353 is 35327102.

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 20172353 - 2² = 20172349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20172359) 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, 11825 + ... + 13422.

It is an arithmetic number, because the mean of its divisors is an integer number (2726784).

Almost surely, 2^20172353 is an apocalyptic number.

It is an amenable number.

20172353 is a deficient number, since it is larger than the sum of its proper divisors (1641919).

20172353 is a wasteful number, since it uses less digits than its factorization.

20172353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25311.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20172353 is about 4491.3642693507. The cubic root of 20172353 is about 272.2192625405.

Adding to 20172353 its reverse (35327102), we get a palindrome (55499455).

The spelling of 20172353 in words is "twenty million, one hundred seventy-two thousand, three hundred fifty-three".