21014323887 has 16 divisors (see below), whose sum is σ = 28085916672. Its totient is φ = 13976172000.

The previous prime is 21014323877. The next prime is 21014323921. The reversal of 21014323887 is 78832341012.

It is not a de Polignac number, because 21014323887 - 2¹² = 21014319791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014323807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4420762 + ... + 4425512.

It is an arithmetic number, because the mean of its divisors is an integer number (1755369792).

Almost surely, 2^21014323887 is an apocalyptic number.

21014323887 is a deficient number, since it is larger than the sum of its proper divisors (7071592785).

21014323887 is a wasteful number, since it uses less digits than its factorization.

21014323887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7958.

The product of its (nonzero) digits is 64512, while the sum is 39.

Adding to 21014323887 its reverse (78832341012), we get a palindrome (99846664899).

The spelling of 21014323887 in words is "twenty-one billion, fourteen million, three hundred twenty-three thousand, eight hundred eighty-seven".