20412555 has 32 divisors (see below), whose sum is σ = 34924800. Its totient is φ = 10150272.

The previous prime is 20412541. The next prime is 20412559. The reversal of 20412555 is 55521402.

It is a happy number.

It is not a de Polignac number, because 20412555 - 2¹² = 20408459 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20412559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18561 + ... + 19629.

It is an arithmetic number, because the mean of its divisors is an integer number (1091400).

Almost surely, 2^20412555 is an apocalyptic number.

20412555 is a deficient number, since it is larger than the sum of its proper divisors (14512245).

20412555 is a wasteful number, since it uses less digits than its factorization.

20412555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 20412555 is about 4518.0255643367. The cubic root of 20412555 is about 273.2954843818.

Adding to 20412555 its reverse (55521402), we get a palindrome (75933957).

The spelling of 20412555 in words is "twenty million, four hundred twelve thousand, five hundred fifty-five".