21962404 has 12 divisors (see below), whose sum is σ = 40457200. Its totient is φ = 10403208.

The previous prime is 21962393. The next prime is 21962411. The reversal of 21962404 is 40426912.

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, 144414 + ... + 144565.

Almost surely, 2^21962404 is an apocalyptic number.

It is an amenable number.

21962404 is a deficient number, since it is larger than the sum of its proper divisors (18494796).

21962404 is a wasteful number, since it uses less digits than its factorization.

21962404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289002 (or 289000 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 21962404 is about 4686.4062990740. The cubic root of 21962404 is about 280.0442277075.

It can be divided in two parts, 21962 and 404, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 21962404 in words is "twenty-one million, nine hundred sixty-two thousand, four hundred four".