21861130435 has 8 divisors (see below), whose sum is σ = 26343120960. Its totient is φ = 17415728064.

The previous prime is 21861130397. The next prime is 21861130441. The reversal of 21861130435 is 53403116812.

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 21861130435 - 2¹⁵ = 21861097667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21861130435.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9145722 + ... + 9148111.

It is an arithmetic number, because the mean of its divisors is an integer number (3292890120).

Almost surely, 2^21861130435 is an apocalyptic number.

21861130435 is a deficient number, since it is larger than the sum of its proper divisors (4481990525).

21861130435 is a wasteful number, since it uses less digits than its factorization.

21861130435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18294077.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 21861130435 in words is "twenty-one billion, eight hundred sixty-one million, one hundred thirty thousand, four hundred thirty-five".