21626202066454 has 32 divisors (see below), whose sum is σ = 34127220337056. Its totient is φ = 10265215484160.

The previous prime is 21626202066421. The next prime is 21626202066479. The reversal of 21626202066454 is 45466020262612.

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, 645157 + ... + 6608224.

It is an arithmetic number, because the mean of its divisors is an integer number (1066475635533).

Almost surely, 2^{21626202066454} is an apocalyptic number.

21626202066454 is a deficient number, since it is larger than the sum of its proper divisors (12501018270602).

21626202066454 is a wasteful number, since it uses less digits than its factorization.

21626202066454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7254400.

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 21626202066454 in words is "twenty-one trillion, six hundred twenty-six billion, two hundred two million, sixty-six thousand, four hundred fifty-four".