21146196 has 48 divisors (see below), whose sum is σ = 51093504. Its totient is φ = 6802656.

The previous prime is 21146189. The next prime is 21146197. The reversal of 21146196 is 69164112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21146197) 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, 55021 + ... + 55403.

It is an arithmetic number, because the mean of its divisors is an integer number (1064448).

Almost surely, 2^21146196 is an apocalyptic number.

It is an amenable number.

21146196 is an abundant number, since it is smaller than the sum of its proper divisors (29947308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21146196 is a wasteful number, since it uses less digits than its factorization.

21146196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

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

The square root of 21146196 is about 4598.4993204305. The cubic root of 21146196 is about 276.5311657245.

The spelling of 21146196 in words is "twenty-one million, one hundred forty-six thousand, one hundred ninety-six".