21294622 has 4 divisors (see below), whose sum is σ = 31941936. Its totient is φ = 10647310.

The previous prime is 21294617. The next prime is 21294629. The reversal of 21294622 is 22649212.

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

It is a super-2 number, since 2×21294622² = 906921852245768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21294629) 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, 5323654 + ... + 5323657.

It is an arithmetic number, because the mean of its divisors is an integer number (7985484).

Almost surely, 2^21294622 is an apocalyptic number.

21294622 is a deficient number, since it is larger than the sum of its proper divisors (10647314).

21294622 is a wasteful number, since it uses less digits than its factorization.

21294622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10647313.

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

The square root of 21294622 is about 4614.6096259597. The cubic root of 21294622 is about 277.1766522969.

The spelling of 21294622 in words is "twenty-one million, two hundred ninety-four thousand, six hundred twenty-two".