21196073 has 2 divisors, whose sum is σ = 21196074. Its totient is φ = 21196072.

The previous prime is 21196069. The next prime is 21196081. The reversal of 21196073 is 37069112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21187609 + 8464 = 4603^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 21196073 - 2² = 21196069 is a prime.

It is not a weakly prime, because it can be changed into another prime (21196003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10598036 + 10598037.

It is an arithmetic number, because the mean of its divisors is an integer number (10598037).

Almost surely, 2^21196073 is an apocalyptic number.

It is an amenable number.

21196073 is a deficient number, since it is larger than the sum of its proper divisors (1).

21196073 is an equidigital number, since it uses as much as digits as its factorization.

21196073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 21196073 is about 4603.9193085892. The cubic root of 21196073 is about 276.7484107094.

It can be divided in two parts, 2119 and 6073, that added together give a 13-th power (8192 = 2¹³).

The spelling of 21196073 in words is "twenty-one million, one hundred ninety-six thousand, seventy-three".