21036495 has 32 divisors (see below), whose sum is σ = 35085312. Its totient is φ = 10754432.

The previous prime is 21036493. The next prime is 21036511. The reversal of 21036495 is 59463012.

It is a cyclic number.

It is not a de Polignac number, because 21036495 - 2¹ = 21036493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37084 + ... + 37646.

It is an arithmetic number, because the mean of its divisors is an integer number (1096416).

Almost surely, 2^21036495 is an apocalyptic number.

21036495 is a deficient number, since it is larger than the sum of its proper divisors (14048817).

21036495 is a wasteful number, since it uses less digits than its factorization.

21036495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 21036495 is about 4586.5558974028. Note that the first 3 decimals coincide. The cubic root of 21036495 is about 276.0521456819.

The spelling of 21036495 in words is "twenty-one million, thirty-six thousand, four hundred ninety-five".