20801746 has 16 divisors (see below), whose sum is σ = 35720640. Its totient is φ = 8899920.

The previous prime is 20801743. The next prime is 20801749. The reversal of 20801746 is 64710802.

It is an interprime number because it is at equal distance from previous prime (20801743) and next prime (20801749).

It is not an unprimeable number, because it can be changed into a prime (20801743) 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 7 ways as a sum of consecutive naturals, for example, 12385 + ... + 13963.

It is an arithmetic number, because the mean of its divisors is an integer number (2232540).

Almost surely, 2^20801746 is an apocalyptic number.

20801746 is a deficient number, since it is larger than the sum of its proper divisors (14918894).

20801746 is a wasteful number, since it uses less digits than its factorization.

20801746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20801746 is about 4560.8931142924. The cubic root of 20801746 is about 275.0214682965.

The spelling of 20801746 in words is "twenty million, eight hundred one thousand, seven hundred forty-six".