21226305454 has 8 divisors (see below), whose sum is σ = 31966309368. Its totient is φ = 10570869000.

The previous prime is 21226305431. The next prime is 21226305517. The reversal of 21226305454 is 45450362212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21226305454² (a number of 21 digits) contains 22 as substring.

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, 21141237 + ... + 21142240.

It is an arithmetic number, because the mean of its divisors is an integer number (3995788671).

Almost surely, 2^21226305454 is an apocalyptic number.

21226305454 is a deficient number, since it is larger than the sum of its proper divisors (10740003914).

21226305454 is a wasteful number, since it uses less digits than its factorization.

21226305454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42283730.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 21226305454 its reverse (45450362212), we get a palindrome (66676667666).

The spelling of 21226305454 in words is "twenty-one billion, two hundred twenty-six million, three hundred five thousand, four hundred fifty-four".