21359135 has 16 divisors (see below), whose sum is σ = 30835200. Its totient is φ = 13874976.

The previous prime is 21359119. The next prime is 21359141. The reversal of 21359135 is 53195312.

It is a cyclic number.

It is not a de Polignac number, because 21359135 - 2⁴ = 21359119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21359098 and 21359107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15395 + ... + 16724.

It is an arithmetic number, because the mean of its divisors is an integer number (1927200).

Almost surely, 2^21359135 is an apocalyptic number.

21359135 is a deficient number, since it is larger than the sum of its proper divisors (9476065).

21359135 is a wasteful number, since it uses less digits than its factorization.

21359135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32150.

The product of its digits is 4050, while the sum is 29.

The square root of 21359135 is about 4621.5944218419. The cubic root of 21359135 is about 277.4562764215.

The spelling of 21359135 in words is "twenty-one million, three hundred fifty-nine thousand, one hundred thirty-five".