20201908 has 6 divisors (see below), whose sum is σ = 35353346. Its totient is φ = 10100952.

The previous prime is 20201897. The next prime is 20201911. The reversal of 20201908 is 80910202.

It can be written as a sum of positive squares in only one way, i.e., 19465744 + 736164 = 4412^2 + 858^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525235 + ... + 2525242.

Almost surely, 2^20201908 is an apocalyptic number.

It is an amenable number.

20201908 is a deficient number, since it is larger than the sum of its proper divisors (15151438).

20201908 is a wasteful number, since it uses less digits than its factorization.

20201908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050481 (or 5050479 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 20201908 is about 4494.6532680508. The cubic root of 20201908 is about 272.3521426646.

The spelling of 20201908 in words is "twenty million, two hundred one thousand, nine hundred eight".