21962099 has 2 divisors, whose sum is σ = 21962100. Its totient is φ = 21962098.

The previous prime is 21962063. The next prime is 21962107. The reversal of 21962099 is 99026912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21962099 - 2⁸ = 21961843 is a prime.

It is not a weakly prime, because it can be changed into another prime (21962029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10981049 + 10981050.

It is an arithmetic number, because the mean of its divisors is an integer number (10981050).

Almost surely, 2^21962099 is an apocalyptic number.

21962099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21962099 is an equidigital number, since it uses as much as digits as its factorization.

21962099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 21962099 is about 4686.3737580351. The cubic root of 21962099 is about 280.0429313423.

The spelling of 21962099 in words is "twenty-one million, nine hundred sixty-two thousand, ninety-nine".