21754575043 has 2 divisors, whose sum is σ = 21754575044. Its totient is φ = 21754575042.

The previous prime is 21754575023. The next prime is 21754575067. The reversal of 21754575043 is 34057545712.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21754575043 - 2⁹ = 21754574531 is a prime.

It is not a weakly prime, because it can be changed into another prime (21754575023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10877287521 + 10877287522.

It is an arithmetic number, because the mean of its divisors is an integer number (10877287522).

Almost surely, 2^21754575043 is an apocalyptic number.

21754575043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21754575043 is an equidigital number, since it uses as much as digits as its factorization.

21754575043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588000, while the sum is 43.

The spelling of 21754575043 in words is "twenty-one billion, seven hundred fifty-four million, five hundred seventy-five thousand, forty-three".