20505122 has 8 divisors (see below), whose sum is σ = 33553872. Its totient is φ = 9320500.

The previous prime is 20505103. The next prime is 20505127. The reversal of 20505122 is 22150502.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20505122.

It is not an unprimeable number, because it can be changed into a prime (20505127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466004 + ... + 466047.

It is an arithmetic number, because the mean of its divisors is an integer number (4194234).

Almost surely, 2^20505122 is an apocalyptic number.

20505122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20505122 is a deficient number, since it is larger than the sum of its proper divisors (13048750).

20505122 is a wasteful number, since it uses less digits than its factorization.

20505122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932064.

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

The square root of 20505122 is about 4528.2581640185. The cubic root of 20505122 is about 273.7079755900.

Adding to 20505122 its reverse (22150502), we get a palindrome (42655624).

The spelling of 20505122 in words is "twenty million, five hundred five thousand, one hundred twenty-two".