20984174 has 4 divisors (see below), whose sum is σ = 31476264. Its totient is φ = 10492086.

The previous prime is 20984147. The next prime is 20984191. The reversal of 20984174 is 47148902.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5246042 + ... + 5246045.

It is an arithmetic number, because the mean of its divisors is an integer number (7869066).

Almost surely, 2^20984174 is an apocalyptic number.

20984174 is a deficient number, since it is larger than the sum of its proper divisors (10492090).

20984174 is a wasteful number, since it uses less digits than its factorization.

20984174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10492089.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20984174 is about 4580.8486113383. The cubic root of 20984174 is about 275.8230942937.

The spelling of 20984174 in words is "twenty million, nine hundred eighty-four thousand, one hundred seventy-four".