20555313 has 8 divisors (see below), whose sum is σ = 28147968. Its totient is φ = 13333104.

The previous prime is 20555299. The next prime is 20555323. The reversal of 20555313 is 31355502.

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

It is not a de Polignac number, because 20555313 - 2¹⁴ = 20538929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20555323) 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, 92481 + ... + 92702.

It is an arithmetic number, because the mean of its divisors is an integer number (3518496).

Almost surely, 2^20555313 is an apocalyptic number.

It is an amenable number.

20555313 is a deficient number, since it is larger than the sum of its proper divisors (7592655).

20555313 is a wasteful number, since it uses less digits than its factorization.

20555313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185223.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 20555313 is about 4533.7967532742. The cubic root of 20555313 is about 273.9311146917.

The spelling of 20555313 in words is "twenty million, five hundred fifty-five thousand, three hundred thirteen".