20601578 has 8 divisors (see below), whose sum is σ = 31026240. Its totient is φ = 10259500.

The previous prime is 20601547. The next prime is 20601593. The reversal of 20601578 is 87510602.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20601578.

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, 20018 + ... + 21021.

It is an arithmetic number, because the mean of its divisors is an integer number (3878280).

Almost surely, 2^20601578 is an apocalyptic number.

20601578 is a deficient number, since it is larger than the sum of its proper divisors (10424662).

20601578 is a wasteful number, since it uses less digits than its factorization.

20601578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41292.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 20601578 is about 4538.8961213053. The cubic root of 20601578 is about 274.1364780874.

The spelling of 20601578 in words is "twenty million, six hundred one thousand, five hundred seventy-eight".