21471622 has 4 divisors (see below), whose sum is σ = 32207436. Its totient is φ = 10735810.

The previous prime is 21471589. The next prime is 21471631. The reversal of 21471622 is 22617412.

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

It is a super-2 number, since 2×21471622² = 922061102621768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5367904 + ... + 5367907.

It is an arithmetic number, because the mean of its divisors is an integer number (8051859).

Almost surely, 2^21471622 is an apocalyptic number.

21471622 is a deficient number, since it is larger than the sum of its proper divisors (10735814).

21471622 is a wasteful number, since it uses less digits than its factorization.

21471622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10735813.

The product of its digits is 1344, while the sum is 25.

The square root of 21471622 is about 4633.7481588882. The cubic root of 21471622 is about 277.9424945321.

The spelling of 21471622 in words is "twenty-one million, four hundred seventy-one thousand, six hundred twenty-two".