20122512 has 40 divisors (see below), whose sum is σ = 52767456. Its totient is φ = 6606336.

The previous prime is 20122511. The next prime is 20122519. The reversal of 20122512 is 21522102.

It is a junction number, because it is equal to n+sod(n) for n = 20122491 and 20122500.

It is not an unprimeable number, because it can be changed into a prime (20122511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88 + ... + 6344.

Almost surely, 2^20122512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20122512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26383728).

20122512 is an abundant number, since it is smaller than the sum of its proper divisors (32644944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20122512 is a wasteful number, since it uses less digits than its factorization.

20122512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6335 (or 6329 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20122512 is about 4485.8123010220. The cubic root of 20122512 is about 271.9948816799.

Adding to 20122512 its reverse (21522102), we get a palindrome (41644614).

The spelling of 20122512 in words is "twenty million, one hundred twenty-two thousand, five hundred twelve".