21530453422 has 16 divisors (see below), whose sum is σ = 32509764000. Its totient is φ = 10693901088.

The previous prime is 21530453411. The next prime is 21530453447. The reversal of 21530453422 is 22435403512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1799223 + ... + 1811149.

It is an arithmetic number, because the mean of its divisors is an integer number (2031860250).

Almost surely, 2^21530453422 is an apocalyptic number.

21530453422 is a deficient number, since it is larger than the sum of its proper divisors (10979310578).

21530453422 is a wasteful number, since it uses less digits than its factorization.

21530453422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17835.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 21530453422 its reverse (22435403512), we get a palindrome (43965856934).

The spelling of 21530453422 in words is "twenty-one billion, five hundred thirty million, four hundred fifty-three thousand, four hundred twenty-two".