21010635043 has 8 divisors (see below), whose sum is σ = 22125344000. Its totient is φ = 19896814728.

The previous prime is 21010635031. The next prime is 21010635047. The reversal of 21010635043 is 34053601012.

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 21010635043 - 2¹⁷ = 21010503971 is a prime.

It is a super-2 number, since 2×21010635043² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010634999 and 21010635017.

It is not an unprimeable number, because it can be changed into a prime (21010635047) 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, 173343 + ... + 268456.

It is an arithmetic number, because the mean of its divisors is an integer number (2765668000).

Almost surely, 2^21010635043 is an apocalyptic number.

21010635043 is a deficient number, since it is larger than the sum of its proper divisors (1114708957).

21010635043 is a wasteful number, since it uses less digits than its factorization.

21010635043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444321.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 21010635043 in words is "twenty-one billion, ten million, six hundred thirty-five thousand, forty-three".