21342196 has 6 divisors (see below), whose sum is σ = 37348850. Its totient is φ = 10671096.

The previous prime is 21342193. The next prime is 21342203. The reversal of 21342196 is 69124312.

It can be written as a sum of positive squares in only one way, i.e., 19678096 + 1664100 = 4436^2 + 1290^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2667771 + ... + 2667778.

Almost surely, 2^21342196 is an apocalyptic number.

It is an amenable number.

21342196 is a deficient number, since it is larger than the sum of its proper divisors (16006654).

21342196 is a wasteful number, since it uses less digits than its factorization.

21342196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335553 (or 5335551 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 21342196 is about 4619.7614657036. The cubic root of 21342196 is about 277.3829108596.

The spelling of 21342196 in words is "twenty-one million, three hundred forty-two thousand, one hundred ninety-six".