20012512 has 48 divisors (see below), whose sum is σ = 43076880. Its totient is φ = 9096192.

The previous prime is 20012479. The next prime is 20012543. The reversal of 20012512 is 21521002.

20012512 is nontrivially palindromic in base 14.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20012492 and 20012501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30039 + ... + 30697.

It is an arithmetic number, because the mean of its divisors is an integer number (897435).

Almost surely, 2^20012512 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 20012512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21538440).

20012512 is an abundant number, since it is smaller than the sum of its proper divisors (23064368).

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

20012512 is a wasteful number, since it uses less digits than its factorization.

20012512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20012512 is about 4473.5346204092. The cubic root of 20012512 is about 271.4983545150.

Adding to 20012512 its reverse (21521002), we get a palindrome (41533514).

The spelling of 20012512 in words is "twenty million, twelve thousand, five hundred twelve".