20244555 has 12 divisors (see below), whose sum is σ = 35090640. Its totient is φ = 10797072.

The previous prime is 20244551. The next prime is 20244559. The reversal of 20244555 is 55544202.

20244555 is a `hidden beast` number, since 202 + 4 + 455 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (20244551) and next prime (20244559).

It is not a de Polignac number, because 20244555 - 2² = 20244551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20244551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224895 + ... + 224984.

It is an arithmetic number, because the mean of its divisors is an integer number (2924220).

Almost surely, 2^20244555 is an apocalyptic number.

20244555 is a deficient number, since it is larger than the sum of its proper divisors (14846085).

20244555 is a wasteful number, since it uses less digits than its factorization.

20244555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449890 (or 449887 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 20244555 is about 4499.3949593251. The cubic root of 20244555 is about 272.5436565580.

Adding to 20244555 its reverse (55544202), we get a palindrome (75788757).

It can be divided in two parts, 202445 and 55, that added together give a square (202500 = 450²).

The spelling of 20244555 in words is "twenty million, two hundred forty-four thousand, five hundred fifty-five".