20051512 has 24 divisors (see below), whose sum is σ = 40713840. Its totient is φ = 9253920.

The previous prime is 20051503. The next prime is 20051527. The reversal of 20051512 is 21515002.

It is a super-2 number, since 2×20051512² = 804126266972288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6064 + ... + 8767.

It is an arithmetic number, because the mean of its divisors is an integer number (1696410).

Almost surely, 2^20051512 is an apocalyptic number.

It is an amenable number.

20051512 is an abundant number, since it is smaller than the sum of its proper divisors (20662328).

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

20051512 is a wasteful number, since it uses less digits than its factorization.

20051512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14863 (or 14846 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 20051512 is about 4477.8914680908. The cubic root of 20051512 is about 271.6746036716.

Adding to 20051512 its reverse (21515002), we get a palindrome (41566514).

The spelling of 20051512 in words is "twenty million, fifty-one thousand, five hundred twelve".