20122455 has 16 divisors (see below), whose sum is σ = 32559840. Its totient is φ = 10610688.

The previous prime is 20122429. The next prime is 20122469. The reversal of 20122455 is 55422102.

It is a happy number.

It is not a de Polignac number, because 20122455 - 2⁸ = 20122199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6202 + ... + 8871.

It is an arithmetic number, because the mean of its divisors is an integer number (2034990).

Almost surely, 2^20122455 is an apocalyptic number.

20122455 is a deficient number, since it is larger than the sum of its proper divisors (12437385).

20122455 is a wasteful number, since it uses less digits than its factorization.

20122455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15170.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20122455 is about 4485.8059476531. The cubic root of 20122455 is about 271.9946248577.

Adding to 20122455 its reverse (55422102), we get a palindrome (75544557).

The spelling of 20122455 in words is "twenty million, one hundred twenty-two thousand, four hundred fifty-five".