20761868 has 6 divisors (see below), whose sum is σ = 36333276. Its totient is φ = 10380932.

The previous prime is 20761861. The next prime is 20761877. The reversal of 20761868 is 86816702.

It is not an unprimeable number, because it can be changed into a prime (20761861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2595230 + ... + 2595237.

It is an arithmetic number, because the mean of its divisors is an integer number (6055546).

Almost surely, 2^20761868 is an apocalyptic number.

It is an amenable number.

20761868 is a deficient number, since it is larger than the sum of its proper divisors (15571408).

20761868 is a wasteful number, since it uses less digits than its factorization.

20761868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190471 (or 5190469 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 20761868 is about 4556.5192855951. The cubic root of 20761868 is about 274.8456125152.

The spelling of 20761868 in words is "twenty million, seven hundred sixty-one thousand, eight hundred sixty-eight".