21420000323134 has 32 divisors (see below), whose sum is σ = 36800742491136. Its totient is φ = 9159816204000.

The previous prime is 21420000323077. The next prime is 21420000323173. The reversal of 21420000323134 is 43132300002412.

It is a junction number, because it is equal to n+sod(n) for n = 21420000323099 and 21420000323108.

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, 229656009 + ... + 229749259.

It is an arithmetic number, because the mean of its divisors is an integer number (1150023202848).

Almost surely, 2^{21420000323134} is an apocalyptic number.

21420000323134 is a deficient number, since it is larger than the sum of its proper divisors (15380742168002).

21420000323134 is a wasteful number, since it uses less digits than its factorization.

21420000323134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129160.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21420000323134 its reverse (43132300002412), we get a palindrome (64552300325546).

The spelling of 21420000323134 in words is "twenty-one trillion, four hundred twenty billion, three hundred twenty-three thousand, one hundred thirty-four".