21457703564135 has 32 divisors (see below), whose sum is σ = 27137483352000. Its totient is φ = 16242882518016.

The previous prime is 21457703564119. The next prime is 21457703564149. The reversal of 21457703564135 is 53146530775412.

It is a cyclic number.

It is not a de Polignac number, because 21457703564135 - 2⁴ = 21457703564119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 285649961 + ... + 285725069.

It is an arithmetic number, because the mean of its divisors is an integer number (848046354750).

Almost surely, 2^{21457703564135} is an apocalyptic number.

21457703564135 is a deficient number, since it is larger than the sum of its proper divisors (5679779787865).

21457703564135 is a wasteful number, since it uses less digits than its factorization.

21457703564135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78755.

The product of its (nonzero) digits is 10584000, while the sum is 53.

The spelling of 21457703564135 in words is "twenty-one trillion, four hundred fifty-seven billion, seven hundred three million, five hundred sixty-four thousand, one hundred thirty-five".