21514413514511 has 2 divisors, whose sum is σ = 21514413514512. Its totient is φ = 21514413514510.

The previous prime is 21514413514471. The next prime is 21514413514571. The reversal of 21514413514511 is 11541531441512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21514413514511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21514413514571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10757206757255 + 10757206757256.

It is an arithmetic number, because the mean of its divisors is an integer number (10757206757256).

Almost surely, 2^{21514413514511} is an apocalyptic number.

21514413514511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21514413514511 is an equidigital number, since it uses as much as digits as its factorization.

21514413514511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 38.

The spelling of 21514413514511 in words is "twenty-one trillion, five hundred fourteen billion, four hundred thirteen million, five hundred fourteen thousand, five hundred eleven".