21030702587 has 8 divisors (see below), whose sum is σ = 21161732592. Its totient is φ = 20899836000.

The previous prime is 21030702571. The next prime is 21030702607. The reversal of 21030702587 is 78520703012.

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 21030702587 - 2⁴ = 21030702571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030702547) 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, 222593 + ... + 302669.

It is an arithmetic number, because the mean of its divisors is an integer number (2645216574).

Almost surely, 2^21030702587 is an apocalyptic number.

21030702587 is a deficient number, since it is larger than the sum of its proper divisors (131030005).

21030702587 is a wasteful number, since it uses less digits than its factorization.

21030702587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81709.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 21030702587 in words is "twenty-one billion, thirty million, seven hundred two thousand, five hundred eighty-seven".