20774146 has 8 divisors (see below), whose sum is σ = 31437324. Its totient is φ = 10295040.

The previous prime is 20774101. The next prime is 20774147. The reversal of 20774146 is 64147702.

It can be written as a sum of positive squares in 2 ways, for example, as 15912121 + 4862025 = 3989^2 + 2205^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20774147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45735 + ... + 46186.

Almost surely, 2^20774146 is an apocalyptic number.

20774146 is a deficient number, since it is larger than the sum of its proper divisors (10663178).

20774146 is a wasteful number, since it uses less digits than its factorization.

20774146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92036.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20774146 is about 4557.8663868086. The cubic root of 20774146 is about 274.8997805609.

The spelling of 20774146 in words is "twenty million, seven hundred seventy-four thousand, one hundred forty-six".