20242555 has 8 divisors (see below), whose sum is σ = 24749712. Its totient is φ = 15888288.

The previous prime is 20242549. The next prime is 20242559. The reversal of 20242555 is 55524202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20242555 is a prime.

It is a super-2 number, since 2×20242555² = 819522065856050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20242559) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 37929 + ... + 38458.

It is an arithmetic number, because the mean of its divisors is an integer number (3093714).

Almost surely, 2^20242555 is an apocalyptic number.

20242555 is a deficient number, since it is larger than the sum of its proper divisors (4507157).

20242555 is an equidigital number, since it uses as much as digits as its factorization.

20242555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76445.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 20242555 is about 4499.1727017308. The cubic root of 20242555 is about 272.5346812184.

Adding to 20242555 its reverse (55524202), we get a palindrome (75766757).

The spelling of 20242555 in words is "twenty million, two hundred forty-two thousand, five hundred fifty-five".