20197893 has 32 divisors (see below), whose sum is σ = 29779840. Its totient is φ = 12130560.

The previous prime is 20197861. The next prime is 20197897. The reversal of 20197893 is 39879102.

It is not a de Polignac number, because 20197893 - 2⁵ = 20197861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20197897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128571 + ... + 128727.

It is an arithmetic number, because the mean of its divisors is an integer number (930620).

Almost surely, 2^20197893 is an apocalyptic number.

It is an amenable number.

20197893 is a deficient number, since it is larger than the sum of its proper divisors (9581947).

20197893 is a wasteful number, since it uses less digits than its factorization.

20197893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 20197893 is about 4494.2066040626. The cubic root of 20197893 is about 272.3340987204.

The spelling of 20197893 in words is "twenty million, one hundred ninety-seven thousand, eight hundred ninety-three".