21453022 has 8 divisors (see below), whose sum is σ = 32786856. Its totient is φ = 10524072.

The previous prime is 21453017. The next prime is 21453037. The reversal of 21453022 is 22035412.

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, 101088 + ... + 101299.

It is an arithmetic number, because the mean of its divisors is an integer number (4098357).

Almost surely, 2^21453022 is an apocalyptic number.

21453022 is a deficient number, since it is larger than the sum of its proper divisors (11333834).

21453022 is a wasteful number, since it uses less digits than its factorization.

21453022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202442.

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

The square root of 21453022 is about 4631.7407094957. The cubic root of 21453022 is about 277.8622145561.

Adding to 21453022 its reverse (22035412), we get a palindrome (43488434).

The spelling of 21453022 in words is "twenty-one million, four hundred fifty-three thousand, twenty-two".