21772962 has 20 divisors (see below), whose sum is σ = 48787926. Its totient is φ = 7257600.

The previous prime is 21772957. The next prime is 21772963. The reversal of 21772962 is 26927712.

It can be written as a sum of positive squares in only one way, i.e., 17816841 + 3956121 = 4221^2 + 1989^2 .

It is not an unprimeable number, because it can be changed into a prime (21772963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 67039 + ... + 67362.

Almost surely, 2^21772962 is an apocalyptic number.

21772962 is an abundant number, since it is smaller than the sum of its proper divisors (27014964).

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

21772962 is a wasteful number, since it uses less digits than its factorization.

21772962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134415 (or 134406 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 21772962 is about 4666.1506619482. The cubic root of 21772962 is about 279.2367051220.

The spelling of 21772962 in words is "twenty-one million, seven hundred seventy-two thousand, nine hundred sixty-two".