15820002851 has 16 divisors (see below), whose sum is σ = 17721776160. Its totient is φ = 14034101760.

The previous prime is 15820002827. The next prime is 15820002859.

It is a happy number.

15820002851 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 15820002851 - 2¹⁸ = 15819740707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15820002859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60680 + ... + 187941.

It is an arithmetic number, because the mean of its divisors is an integer number (1107611010).

Almost surely, 2^15820002851 is an apocalyptic number.

15820002851 is a deficient number, since it is larger than the sum of its proper divisors (1901773309).

15820002851 is a wasteful number, since it uses less digits than its factorization.

15820002851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248854.

The product of its (nonzero) digits is 6400, while the sum is 32.

It can be divided in two parts, 1582000 and 2851, that added together give a palindrome (1584851).

The spelling of 15820002851 in words is "fifteen billion, eight hundred twenty million, two thousand, eight hundred fifty-one".