21962051 has 2 divisors, whose sum is σ = 21962052. Its totient is φ = 21962050.

The previous prime is 21962041. The next prime is 21962063. The reversal of 21962051 is 15026912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21962051 - 2¹⁴ = 21945667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21962051.

It is not a weakly prime, because it can be changed into another prime (21962021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10981025 + 10981026.

It is an arithmetic number, because the mean of its divisors is an integer number (10981026).

Almost surely, 2^21962051 is an apocalyptic number.

21962051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21962051 is an equidigital number, since it uses as much as digits as its factorization.

21962051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 21962051 is about 4686.3686368018. The cubic root of 21962051 is about 280.0427273231.

Adding to 21962051 its reverse (15026912), we get a palindrome (36988963).

The spelling of 21962051 in words is "twenty-one million, nine hundred sixty-two thousand, fifty-one".