21350534135 has 64 divisors (see below), whose sum is σ = 31260902400. Its totient is φ = 13687833600.

The previous prime is 21350534129. The next prime is 21350534171. The reversal of 21350534135 is 53143505312.

It is not a de Polignac number, because 21350534135 - 2¹⁶ = 21350468599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5782640 + ... + 5786330.

It is an arithmetic number, because the mean of its divisors is an integer number (488451600).

Almost surely, 2^21350534135 is an apocalyptic number.

21350534135 is a deficient number, since it is larger than the sum of its proper divisors (9910368265).

21350534135 is a wasteful number, since it uses less digits than its factorization.

21350534135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 21350534135 in words is "twenty-one billion, three hundred fifty million, five hundred thirty-four thousand, one hundred thirty-five".