21514002187 has 8 divisors (see below), whose sum is σ = 21727319472. Its totient is φ = 21300912000.

The previous prime is 21514002161. The next prime is 21514002193. The reversal of 21514002187 is 78120041512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21514002187 - 2¹¹ = 21514000139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21514002137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136887 + ... + 248527.

It is an arithmetic number, because the mean of its divisors is an integer number (2715914934).

Almost surely, 2^21514002187 is an apocalyptic number.

21514002187 is a deficient number, since it is larger than the sum of its proper divisors (213317285).

21514002187 is a wasteful number, since it uses less digits than its factorization.

21514002187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113549.

The product of its (nonzero) digits is 4480, while the sum is 31.

Adding to 21514002187 its reverse (78120041512), we get a palindrome (99634043699).

The spelling of 21514002187 in words is "twenty-one billion, five hundred fourteen million, two thousand, one hundred eighty-seven".