21126504676 has 12 divisors (see below), whose sum is σ = 36974409472. Its totient is φ = 10562387688.

The previous prime is 21126504661. The next prime is 21126504689. The reversal of 21126504676 is 67640562112.

It is a happy 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, 159540 + ... + 260203.

Almost surely, 2^21126504676 is an apocalyptic number.

It is an amenable number.

21126504676 is a deficient number, since it is larger than the sum of its proper divisors (15847904796).

21126504676 is a wasteful number, since it uses less digits than its factorization.

21126504676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432330 (or 432328 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 21126504676 in words is "twenty-one billion, one hundred twenty-six million, five hundred four thousand, six hundred seventy-six".