21354022 has 8 divisors (see below), whose sum is σ = 32153616. Its totient is φ = 10636152.

The previous prime is 21354019. The next prime is 21354049. The reversal of 21354022 is 22045312.

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, 19773 + ... + 20824.

It is an arithmetic number, because the mean of its divisors is an integer number (4019202).

Almost surely, 2^21354022 is an apocalyptic number.

21354022 is a deficient number, since it is larger than the sum of its proper divisors (10799594).

21354022 is a wasteful number, since it uses less digits than its factorization.

21354022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40862.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21354022 is about 4621.0412246592. The cubic root of 21354022 is about 277.4341352759.

Adding to 21354022 its reverse (22045312), we get a palindrome (43399334).

The spelling of 21354022 in words is "twenty-one million, three hundred fifty-four thousand, twenty-two".