21043511134 has 8 divisors (see below), whose sum is σ = 31567524408. Its totient is φ = 10521003000.

The previous prime is 21043511119. The next prime is 21043511143. The reversal of 21043511134 is 43111534012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21043511099 and 21043511108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340657 + ... + 397660.

It is an arithmetic number, because the mean of its divisors is an integer number (3945940551).

Almost surely, 2^21043511134 is an apocalyptic number.

21043511134 is a deficient number, since it is larger than the sum of its proper divisors (10524013274).

21043511134 is a wasteful number, since it uses less digits than its factorization.

21043511134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752570.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 21043511134 in words is "twenty-one billion, forty-three million, five hundred eleven thousand, one hundred thirty-four".