21936962 has 4 divisors (see below), whose sum is σ = 32905446. Its totient is φ = 10968480.

The previous prime is 21936961. The next prime is 21936973. The reversal of 21936962 is 26963912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21613201 + 323761 = 4649^2 + 569^2 .

It is not an unprimeable number, because it can be changed into a prime (21936961) 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, 5484239 + ... + 5484242.

Almost surely, 2^21936962 is an apocalyptic number.

21936962 is a deficient number, since it is larger than the sum of its proper divisors (10968484).

21936962 is a wasteful number, since it uses less digits than its factorization.

21936962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968483.

The product of its digits is 34992, while the sum is 38.

The square root of 21936962 is about 4683.6910658155. The cubic root of 21936962 is about 279.9360483198.

The spelling of 21936962 in words is "twenty-one million, nine hundred thirty-six thousand, nine hundred sixty-two".