21734467651213 has 2 divisors, whose sum is σ = 21734467651214. Its totient is φ = 21734467651212.

The previous prime is 21734467651063. The next prime is 21734467651297. The reversal of 21734467651213 is 31215676443712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21722329561284 + 12138089929 = 4660722^2 + 110173^2 .

It is a cyclic number.

It is not a de Polignac number, because 21734467651213 - 2⁴¹ = 19535444395661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21734467651613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10867233825606 + 10867233825607.

It is an arithmetic number, because the mean of its divisors is an integer number (10867233825607).

Almost surely, 2^{21734467651213} is an apocalyptic number.

It is an amenable number.

21734467651213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21734467651213 is an equidigital number, since it uses as much as digits as its factorization.

21734467651213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 52.

The spelling of 21734467651213 in words is "twenty-one trillion, seven hundred thirty-four billion, four hundred sixty-seven million, six hundred fifty-one thousand, two hundred thirteen".