21602426225254 has 32 divisors (see below), whose sum is σ = 37247988960000. Its totient is φ = 9204397377120.

The previous prime is 21602426225209. The next prime is 21602426225351. The reversal of 21602426225254 is 45252262420612.

It is a self number, because there is not a number n which added to its sum of digits gives 21602426225254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7648257 + ... + 10084675.

It is an arithmetic number, because the mean of its divisors is an integer number (1163999655000).

Almost surely, 2^{21602426225254} is an apocalyptic number.

21602426225254 is a deficient number, since it is larger than the sum of its proper divisors (15645562734746).

21602426225254 is a wasteful number, since it uses less digits than its factorization.

21602426225254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440108.

The product of its (nonzero) digits is 921600, while the sum is 43.

Adding to 21602426225254 its reverse (45252262420612), we get a palindrome (66854688645866).

The spelling of 21602426225254 in words is "twenty-one trillion, six hundred two billion, four hundred twenty-six million, two hundred twenty-five thousand, two hundred fifty-four".