21196461 has 16 divisors (see below), whose sum is σ = 33203520. Its totient is φ = 11857920.

The previous prime is 21196453. The next prime is 21196481. The reversal of 21196461 is 16469112.

It is a happy number.

It is not a de Polignac number, because 21196461 - 2³ = 21196453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21196451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24276 + ... + 25133.

It is an arithmetic number, because the mean of its divisors is an integer number (2075220).

Almost surely, 2^21196461 is an apocalyptic number.

It is an amenable number.

21196461 is a deficient number, since it is larger than the sum of its proper divisors (12007059).

21196461 is a wasteful number, since it uses less digits than its factorization.

21196461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49436.

The product of its digits is 2592, while the sum is 30.

The square root of 21196461 is about 4603.9614464068. The cubic root of 21196461 is about 276.7500993513.

The spelling of 21196461 in words is "twenty-one million, one hundred ninety-six thousand, four hundred sixty-one".