21422054 has 8 divisors (see below), whose sum is σ = 33169728. Its totient is φ = 10365480.

The previous prime is 21422053. The next prime is 21422077. The reversal of 21422054 is 45022412.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422053) 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, 172697 + ... + 172820.

It is an arithmetic number, because the mean of its divisors is an integer number (4146216).

Almost surely, 2^21422054 is an apocalyptic number.

21422054 is a deficient number, since it is larger than the sum of its proper divisors (11747674).

21422054 is a wasteful number, since it uses less digits than its factorization.

21422054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345550.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 21422054 is about 4628.3964825844. The cubic root of 21422054 is about 277.7284497060.

Adding to 21422054 its reverse (45022412), we get a palindrome (66444466).

The spelling of 21422054 in words is "twenty-one million, four hundred twenty-two thousand, fifty-four".