21724137959059 has 2 divisors, whose sum is σ = 21724137959060. Its totient is φ = 21724137959058.

The previous prime is 21724137959039. The next prime is 21724137959063. The reversal of 21724137959059 is 95095973142712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21724137959059 is a prime.

It is not a weakly prime, because it can be changed into another prime (21724137959039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10862068979529 + 10862068979530.

It is an arithmetic number, because the mean of its divisors is an integer number (10862068979530).

Almost surely, 2^{21724137959059} is an apocalyptic number.

21724137959059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21724137959059 is an equidigital number, since it uses as much as digits as its factorization.

21724137959059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42865200, while the sum is 64.

The spelling of 21724137959059 in words is "twenty-one trillion, seven hundred twenty-four billion, one hundred thirty-seven million, nine hundred fifty-nine thousand, fifty-nine".