21949762 has 8 divisors (see below), whose sum is σ = 32947596. Its totient is φ = 10967232.

The previous prime is 21949747. The next prime is 21949783. The reversal of 21949762 is 26794912.

It can be written as a sum of positive squares in 2 ways, for example, as 21538881 + 410881 = 4641^2 + 641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 958 + ... + 6694.

Almost surely, 2^21949762 is an apocalyptic number.

21949762 is a deficient number, since it is larger than the sum of its proper divisors (10997834).

21949762 is a wasteful number, since it uses less digits than its factorization.

21949762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7652.

The product of its digits is 54432, while the sum is 40.

The square root of 21949762 is about 4685.0573102151. The cubic root of 21949762 is about 279.9904843705.

The spelling of 21949762 in words is "twenty-one million, nine hundred forty-nine thousand, seven hundred sixty-two".