21051168467 has 20 divisors (see below), whose sum is σ = 24705761136. Its totient is φ = 17935470000.

The previous prime is 21051168409. The next prime is 21051168497. The reversal of 21051168467 is 76486115012.

It is not a de Polignac number, because 21051168467 - 2⁸ = 21051168211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21051168497) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 374717 + ... + 427217.

Almost surely, 2^21051168467 is an apocalyptic number.

21051168467 is a deficient number, since it is larger than the sum of its proper divisors (3654592669).

21051168467 is an frugal number, since it uses more digits than its factorization.

21051168467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52696 (or 52675 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 21051168467 in words is "twenty-one billion, fifty-one million, one hundred sixty-eight thousand, four hundred sixty-seven".