21419561587 has 8 divisors (see below), whose sum is σ = 22763851200. Its totient is φ = 20084640384.

The previous prime is 21419561573. The next prime is 21419561623. The reversal of 21419561587 is 78516591412.

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 21419561587 - 2³¹ = 19272077939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21419561587.

It is not an unprimeable number, because it can be changed into a prime (21419561087) 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 7 ways as a sum of consecutive naturals, for example, 2337387 + ... + 2346532.

It is an arithmetic number, because the mean of its divisors is an integer number (2845481400).

Almost surely, 2^21419561587 is an apocalyptic number.

21419561587 is a deficient number, since it is larger than the sum of its proper divisors (1344289613).

21419561587 is a wasteful number, since it uses less digits than its factorization.

21419561587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684205.

The product of its digits is 604800, while the sum is 49.

The spelling of 21419561587 in words is "twenty-one billion, four hundred nineteen million, five hundred sixty-one thousand, five hundred eighty-seven".