20746868 has 12 divisors (see below), whose sum is σ = 38442852. Its totient is φ = 9763200.

The previous prime is 20746853. The next prime is 20746883. The reversal of 20746868 is 86864702.

It is an interprime number because it is at equal distance from previous prime (20746853) and next prime (20746883).

It can be written as a sum of positive squares in 2 ways, for example, as 18472804 + 2274064 = 4298^2 + 1508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152483 + ... + 152618.

It is an arithmetic number, because the mean of its divisors is an integer number (3203571).

Almost surely, 2^20746868 is an apocalyptic number.

It is an amenable number.

20746868 is a deficient number, since it is larger than the sum of its proper divisors (17695984).

20746868 is a wasteful number, since it uses less digits than its factorization.

20746868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305122 (or 305120 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 20746868 is about 4554.8729949363. The cubic root of 20746868 is about 274.7794065676.

The spelling of 20746868 in words is "twenty million, seven hundred forty-six thousand, eight hundred sixty-eight".