21204030422 has 16 divisors (see below), whose sum is σ = 32320154112. Its totient is φ = 10431032040.

The previous prime is 21204030409. The next prime is 21204030433. The reversal of 21204030422 is 22403040212.

It is a super-2 number, since 2×21204030422² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21204030394 and 21204030403.

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, 14147 + ... + 206417.

It is an arithmetic number, because the mean of its divisors is an integer number (2020009632).

Almost surely, 2^21204030422 is an apocalyptic number.

21204030422 is a deficient number, since it is larger than the sum of its proper divisors (11116123690).

21204030422 is a wasteful number, since it uses less digits than its factorization.

21204030422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193163.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21204030422 its reverse (22403040212), we get a palindrome (43607070634).

The spelling of 21204030422 in words is "twenty-one billion, two hundred four million, thirty thousand, four hundred twenty-two".