22021946 has 8 divisors (see below), whose sum is σ = 33095604. Its totient is φ = 10990080.

The previous prime is 22021943. The next prime is 22021957. The reversal of 22021946 is 64912022.

It can be written as a sum of positive squares in 2 ways, for example, as 21724921 + 297025 = 4661^2 + 545^2 .

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

It is a super-2 number, since 2×22021946² = 969932211253832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22021943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9095 + ... + 11258.

Almost surely, 2^22021946 is an apocalyptic number.

22021946 is a deficient number, since it is larger than the sum of its proper divisors (11073658).

22021946 is a wasteful number, since it uses less digits than its factorization.

22021946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20896.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 22021946 is about 4692.7546281475. The cubic root of 22021946 is about 280.2970741548.

Adding to 22021946 its reverse (64912022), we get a palindrome (86933968).

The spelling of 22021946 in words is "twenty-two million, twenty-one thousand, nine hundred forty-six".