21041062851 has 8 divisors (see below), whose sum is σ = 28073177280. Its totient is φ = 14018161832.

The previous prime is 21041062831. The next prime is 21041062871. The reversal of 21041062851 is 15826014012.

It is an interprime number because it is at equal distance from previous prime (21041062831) and next prime (21041062871).

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 21041062851 - 2²⁵ = 21007508419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21041062831) 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, 2298021 + ... + 2307158.

It is an arithmetic number, because the mean of its divisors is an integer number (3509147160).

Almost surely, 2^21041062851 is an apocalyptic number.

21041062851 is a deficient number, since it is larger than the sum of its proper divisors (7032114429).

21041062851 is a wasteful number, since it uses less digits than its factorization.

21041062851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606705.

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 21041062851 its reverse (15826014012), we get a palindrome (36867076863).

The spelling of 21041062851 in words is "twenty-one billion, forty-one million, sixty-two thousand, eight hundred fifty-one".