20855788 has 6 divisors (see below), whose sum is σ = 36497636. Its totient is φ = 10427892.

The previous prime is 20855771. The next prime is 20855789. The reversal of 20855788 is 88755802.

It is not an unprimeable number, because it can be changed into a prime (20855789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2606970 + ... + 2606977.

Almost surely, 2^20855788 is an apocalyptic number.

It is an amenable number.

20855788 is a deficient number, since it is larger than the sum of its proper divisors (15641848).

20855788 is a wasteful number, since it uses less digits than its factorization.

20855788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5213951 (or 5213949 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 20855788 is about 4566.8137689203. The cubic root of 20855788 is about 275.2594268129.

The spelling of 20855788 in words is "twenty million, eight hundred fifty-five thousand, seven hundred eighty-eight".