21164096 has 14 divisors (see below), whose sum is σ = 41997630. Its totient is φ = 10582016.

The previous prime is 21164093. The next prime is 21164107. The reversal of 21164096 is 69046112.

It can be written as a sum of positive squares in only one way, i.e., 21160000 + 4096 = 4600^2 + 64^2 .

It is not an unprimeable number, because it can be changed into a prime (21164093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165281 + ... + 165408.

Almost surely, 2^21164096 is an apocalyptic number.

It is an amenable number.

21164096 is a deficient number, since it is larger than the sum of its proper divisors (20833534).

21164096 is an equidigital number, since it uses as much as digits as its factorization.

21164096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330701 (or 330691 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 21164096 is about 4600.4451958479. The cubic root of 21164096 is about 276.6091704847.

It can be divided in two parts, 2116 and 4096, that multiplied together give a square (8667136 = 2944²).

The spelling of 21164096 in words is "twenty-one million, one hundred sixty-four thousand, ninety-six".