20151512284 has 18 divisors (see below), whose sum is σ = 36865081400. Its totient is φ = 9637678776.

The previous prime is 20151512281. The next prime is 20151512287. The reversal of 20151512284 is 48221515102.

It is an interprime number because it is at equal distance from previous prime (20151512281) and next prime (20151512287).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20151512281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4759584 + ... + 4763815.

Almost surely, 2^20151512284 is an apocalyptic number.

It is an amenable number.

20151512284 is a deficient number, since it is larger than the sum of its proper divisors (16713569116).

20151512284 is a wasteful number, since it uses less digits than its factorization.

20151512284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523449 (or 9523424 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The spelling of 20151512284 in words is "twenty billion, one hundred fifty-one million, five hundred twelve thousand, two hundred eighty-four".