22021473 has 8 divisors (see below), whose sum is σ = 29494528. Its totient is φ = 14614704.

The previous prime is 22021457. The next prime is 22021499. The reversal of 22021473 is 37412022.

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

It is not a de Polignac number, because 22021473 - 2⁴ = 22021457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15790 + ... + 17127.

It is an arithmetic number, because the mean of its divisors is an integer number (3686816).

Almost surely, 2^22021473 is an apocalyptic number.

It is an amenable number.

22021473 is a deficient number, since it is larger than the sum of its proper divisors (7473055).

22021473 is a wasteful number, since it uses less digits than its factorization.

22021473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33143.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 22021473 is about 4692.7042310378. The cubic root of 22021473 is about 280.2950673466.

Adding to 22021473 its reverse (37412022), we get a palindrome (59433495).

The spelling of 22021473 in words is "twenty-two million, twenty-one thousand, four hundred seventy-three".