21910674043 has 4 divisors (see below), whose sum is σ = 23199537240. Its totient is φ = 20621810848.

The previous prime is 21910674029. The next prime is 21910674059. The reversal of 21910674043 is 34047601912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21910674043 - 2²⁹ = 21373803131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21910673993 and 21910674011.

It is not an unprimeable number, because it can be changed into a prime (21910674143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644431573 + ... + 644431606.

It is an arithmetic number, because the mean of its divisors is an integer number (5799884310).

Almost surely, 2^21910674043 is an apocalyptic number.

21910674043 is a deficient number, since it is larger than the sum of its proper divisors (1288863197).

21910674043 is a wasteful number, since it uses less digits than its factorization.

21910674043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288863196.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 21910674043 in words is "twenty-one billion, nine hundred ten million, six hundred seventy-four thousand, forty-three".