20116578 has 8 divisors (see below), whose sum is σ = 40233168. Its totient is φ = 6705524.

The previous prime is 20116543. The next prime is 20116619. The reversal of 20116578 is 87561102.

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

20116578 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1676376 + ... + 1676387.

It is an arithmetic number, because the mean of its divisors is an integer number (5029146).

Almost surely, 2^20116578 is an apocalyptic number.

20116578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20116578 is a wasteful number, since it uses less digits than its factorization.

20116578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352768.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 20116578 is about 4485.1508335841. The cubic root of 20116578 is about 271.9681425348.

The spelling of 20116578 in words is "twenty million, one hundred sixteen thousand, five hundred seventy-eight".