20191245 has 8 divisors (see below), whose sum is σ = 32306016. Its totient is φ = 10768656.

The previous prime is 20191231. The next prime is 20191253. The reversal of 20191245 is 54219102.

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

It is not a de Polignac number, because 20191245 - 2⁶ = 20191181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673027 + ... + 673056.

It is an arithmetic number, because the mean of its divisors is an integer number (4038252).

Almost surely, 2^20191245 is an apocalyptic number.

It is an amenable number.

20191245 is a deficient number, since it is larger than the sum of its proper divisors (12114771).

20191245 is a wasteful number, since it uses less digits than its factorization.

20191245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346091.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20191245 is about 4493.4669243247. The cubic root of 20191245 is about 272.3042164655.

The spelling of 20191245 in words is "twenty million, one hundred ninety-one thousand, two hundred forty-five".