21954422 has 8 divisors (see below), whose sum is σ = 37636176. Its totient is φ = 9409032.

The previous prime is 21954403. The next prime is 21954461. The reversal of 21954422 is 22445912.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784073 + ... + 784100.

It is an arithmetic number, because the mean of its divisors is an integer number (4704522).

Almost surely, 2^21954422 is an apocalyptic number.

21954422 is a deficient number, since it is larger than the sum of its proper divisors (15681754).

21954422 is a wasteful number, since it uses less digits than its factorization.

21954422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568182.

The product of its digits is 5760, while the sum is 29.

The square root of 21954422 is about 4685.5546096487. The cubic root of 21954422 is about 280.0102972404.

The spelling of 21954422 in words is "twenty-one million, nine hundred fifty-four thousand, four hundred twenty-two".