21879046043 has 2 divisors, whose sum is σ = 21879046044. Its totient is φ = 21879046042.

The previous prime is 21879046039. The next prime is 21879046067. The reversal of 21879046043 is 34064097812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21879046043 - 2² = 21879046039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21879045985 and 21879046003.

It is not a weakly prime, because it can be changed into another prime (21879046073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10939523021 + 10939523022.

It is an arithmetic number, because the mean of its divisors is an integer number (10939523022).

Almost surely, 2^21879046043 is an apocalyptic number.

21879046043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21879046043 is an equidigital number, since it uses as much as digits as its factorization.

21879046043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 21879046043 in words is "twenty-one billion, eight hundred seventy-nine million, forty-six thousand, forty-three".