20927146 has 4 divisors (see below), whose sum is σ = 31390722. Its totient is φ = 10463572.

The previous prime is 20927143. The next prime is 20927147. The reversal of 20927146 is 64172902.

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

It can be written as a sum of positive squares in only one way, i.e., 13771521 + 7155625 = 3711^2 + 2675^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20927141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5231785 + ... + 5231788.

Almost surely, 2^20927146 is an apocalyptic number.

20927146 is a deficient number, since it is larger than the sum of its proper divisors (10463576).

20927146 is a wasteful number, since it uses less digits than its factorization.

20927146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10463575.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20927146 is about 4574.6197656199. The cubic root of 20927146 is about 275.5730024820.

The spelling of 20927146 in words is "twenty million, nine hundred twenty-seven thousand, one hundred forty-six".