21226065453 has 24 divisors (see below), whose sum is σ = 32596566912. Its totient is φ = 13280069088.

The previous prime is 21226065437. The next prime is 21226065461. The reversal of 21226065453 is 35456062212.

21226065453 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 606 + 5 + 45 + 3 = 666.

It is not a de Polignac number, because 21226065453 - 2⁴ = 21226065437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226065463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 956401 + ... + 978342.

It is an arithmetic number, because the mean of its divisors is an integer number (1358190288).

Almost surely, 2^21226065453 is an apocalyptic number.

21226065453 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21226065453 is a deficient number, since it is larger than the sum of its proper divisors (11370501459).

21226065453 is a wasteful number, since it uses less digits than its factorization.

21226065453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934825 (or 1934822 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 21226065453 in words is "twenty-one billion, two hundred twenty-six million, sixty-five thousand, four hundred fifty-three".