20022155 has 16 divisors (see below), whose sum is σ = 24554880. Its totient is φ = 15669888.

The previous prime is 20022137. The next prime is 20022179. The reversal of 20022155 is 55122002.

It is a cyclic number.

It is not a de Polignac number, because 20022155 - 2²⁴ = 3244939 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 68189 + ... + 68481.

It is an arithmetic number, because the mean of its divisors is an integer number (1534680).

Almost surely, 2^20022155 is an apocalyptic number.

20022155 is a deficient number, since it is larger than the sum of its proper divisors (4532725).

20022155 is a wasteful number, since it uses less digits than its factorization.

20022155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20022155 is about 4474.6122737060. The cubic root of 20022155 is about 271.5419545429.

Adding to 20022155 its reverse (55122002), we get a palindrome (75144157).

The spelling of 20022155 in words is "twenty million, twenty-two thousand, one hundred fifty-five".