20355122 has 4 divisors (see below), whose sum is σ = 30532686. Its totient is φ = 10177560.

The previous prime is 20355121. The next prime is 20355133. The reversal of 20355122 is 22155302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19971961 + 383161 = 4469^2 + 619^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20355094 and 20355103.

It is not an unprimeable number, because it can be changed into a prime (20355121) 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, 5088779 + ... + 5088782.

Almost surely, 2^20355122 is an apocalyptic number.

20355122 is a deficient number, since it is larger than the sum of its proper divisors (10177564).

20355122 is a wasteful number, since it uses less digits than its factorization.

20355122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177563.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20355122 is about 4511.6651028196. The cubic root of 20355122 is about 273.0389278395.

The spelling of 20355122 in words is "twenty million, three hundred fifty-five thousand, one hundred twenty-two".