21134400026 has 16 divisors (see below), whose sum is σ = 32333966208. Its totient is φ = 10358132400.

The previous prime is 21134399989. The next prime is 21134400031. The reversal of 21134400026 is 62000443112.

It is a junction number, because it is equal to n+sod(n) for n = 21134399974 and 21134400010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405590 + ... + 454721.

It is an arithmetic number, because the mean of its divisors is an integer number (2020872888).

Almost surely, 2^21134400026 is an apocalyptic number.

21134400026 is a deficient number, since it is larger than the sum of its proper divisors (11199566182).

21134400026 is a wasteful number, since it uses less digits than its factorization.

21134400026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860557.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21134400026 its reverse (62000443112), we get a palindrome (83134843138).

The spelling of 21134400026 in words is "twenty-one billion, one hundred thirty-four million, four hundred thousand, twenty-six".