21213426604454 has 16 divisors (see below), whose sum is σ = 36367797024288. Its totient is φ = 9090987833472.

The previous prime is 21213426604453. The next prime is 21213426604493. The reversal of 21213426604454 is 45440662431212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213426604453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39784979 + ... + 40314654.

It is an arithmetic number, because the mean of its divisors is an integer number (2272987314018).

Almost surely, 2^{21213426604454} is an apocalyptic number.

21213426604454 is a deficient number, since it is larger than the sum of its proper divisors (15154370419834).

21213426604454 is a wasteful number, since it uses less digits than its factorization.

21213426604454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80118559.

The product of its (nonzero) digits is 1105920, while the sum is 44.

The spelling of 21213426604454 in words is "twenty-one trillion, two hundred thirteen billion, four hundred twenty-six million, six hundred four thousand, four hundred fifty-four".