21357534109735 has 8 divisors (see below), whose sum is σ = 25634633156640. Its totient is φ = 17082299137824.

The previous prime is 21357534109721. The next prime is 21357534109763. The reversal of 21357534109735 is 53790143575312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21357534109735 - 2¹⁷ = 21357533978663 is a prime.

It is a super-2 number, since 2×21357534109735² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465993540 + ... + 466039369.

It is an arithmetic number, because the mean of its divisors is an integer number (3204329144580).

Almost surely, 2^{21357534109735} is an apocalyptic number.

21357534109735 is a deficient number, since it is larger than the sum of its proper divisors (4277099046905).

21357534109735 is an equidigital number, since it uses as much as digits as its factorization.

21357534109735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932037497.

The product of its (nonzero) digits is 11907000, while the sum is 55.

The spelling of 21357534109735 in words is "twenty-one trillion, three hundred fifty-seven billion, five hundred thirty-four million, one hundred nine thousand, seven hundred thirty-five".