20878193 has 8 divisors (see below), whose sum is σ = 25264512. Its totient is φ = 16842816.

The previous prime is 20878171. The next prime is 20878201. The reversal of 20878193 is 39187802.

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 20878193 - 2⁶ = 20878129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20878103) 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, 87605 + ... + 87842.

It is an arithmetic number, because the mean of its divisors is an integer number (3158064).

Almost surely, 2^20878193 is an apocalyptic number.

It is an amenable number.

20878193 is a deficient number, since it is larger than the sum of its proper divisors (4386319).

20878193 is a wasteful number, since it uses less digits than its factorization.

20878193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175471.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 20878193 is about 4569.2661336368. The cubic root of 20878193 is about 275.3579602966.

The spelling of 20878193 in words is "twenty million, eight hundred seventy-eight thousand, one hundred ninety-three".