20011215512 has 16 divisors (see below), whose sum is σ = 38228973840. Its totient is φ = 9816822496.

The previous prime is 20011215509. The next prime is 20011215529. The reversal of 20011215512 is 21551211002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23597708 + ... + 23598555.

It is an arithmetic number, because the mean of its divisors is an integer number (2389310865).

Almost surely, 2^20011215512 is an apocalyptic number.

It is an amenable number.

20011215512 is a deficient number, since it is larger than the sum of its proper divisors (18217758328).

20011215512 is a wasteful number, since it uses less digits than its factorization.

20011215512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47196322 (or 47196318 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 20011215512 its reverse (21551211002), we get a palindrome (41562426514).

The spelling of 20011215512 in words is "twenty billion, eleven million, two hundred fifteen thousand, five hundred twelve".