21610507135 has 16 divisors (see below), whose sum is σ = 29640586752. Its totient is φ = 14816973600.

The previous prime is 21610507103. The next prime is 21610507169. The reversal of 21610507135 is 53170501612.

It is not a de Polignac number, because 21610507135 - 2⁵ = 21610507103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21610507097 and 21610507106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339270 + ... + 397900.

It is an arithmetic number, because the mean of its divisors is an integer number (1852536672).

Almost surely, 2^21610507135 is an apocalyptic number.

21610507135 is a deficient number, since it is larger than the sum of its proper divisors (8030079617).

21610507135 is a wasteful number, since it uses less digits than its factorization.

21610507135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69174.

The product of its (nonzero) digits is 6300, while the sum is 31.

The spelling of 21610507135 in words is "twenty-one billion, six hundred ten million, five hundred seven thousand, one hundred thirty-five".