21740546063 has 2 divisors, whose sum is σ = 21740546064. Its totient is φ = 21740546062.

The previous prime is 21740545991. The next prime is 21740546119. The reversal of 21740546063 is 36064504712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21740546063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21740543063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10870273031 + 10870273032.

It is an arithmetic number, because the mean of its divisors is an integer number (10870273032).

Almost surely, 2^21740546063 is an apocalyptic number.

21740546063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21740546063 is an equidigital number, since it uses as much as digits as its factorization.

21740546063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 21740546063 in words is "twenty-one billion, seven hundred forty million, five hundred forty-six thousand, sixty-three".