20746172 has 6 divisors (see below), whose sum is σ = 36305808. Its totient is φ = 10373084.

The previous prime is 20746147. The next prime is 20746177. The reversal of 20746172 is 27164702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2593268 + ... + 2593275.

It is an arithmetic number, because the mean of its divisors is an integer number (6050968).

Almost surely, 2^20746172 is an apocalyptic number.

It is an amenable number.

20746172 is a deficient number, since it is larger than the sum of its proper divisors (15559636).

20746172 is a wasteful number, since it uses less digits than its factorization.

20746172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186547 (or 5186545 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 20746172 is about 4554.7965926043. The cubic root of 20746172 is about 274.7763338371.

The spelling of 20746172 in words is "twenty million, seven hundred forty-six thousand, one hundred seventy-two".