20122808 has 8 divisors (see below), whose sum is σ = 37730280. Its totient is φ = 10061400.

The previous prime is 20122807. The next prime is 20122819. The reversal of 20122808 is 80822102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257668 + ... + 1257683.

It is an arithmetic number, because the mean of its divisors is an integer number (4716285).

Almost surely, 2^20122808 is an apocalyptic number.

It is an amenable number.

20122808 is a deficient number, since it is larger than the sum of its proper divisors (17607472).

20122808 is a wasteful number, since it uses less digits than its factorization.

20122808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515357 (or 2515353 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 20122808 is about 4485.8452938103. The cubic root of 20122808 is about 271.9962153453.

The spelling of 20122808 in words is "twenty million, one hundred twenty-two thousand, eight hundred eight".