21311454858 has 16 divisors (see below), whose sum is σ = 42636027360. Its totient is φ = 7101632016.

The previous prime is 21311454851. The next prime is 21311454863. The reversal of 21311454858 is 85845411312.

It is a happy number.

It is a super-3 number, since 3×21311454858³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21311454851) by changing a digit.

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, 525385 + ... + 564492.

It is an arithmetic number, because the mean of its divisors is an integer number (2664751710).

Almost surely, 2^21311454858 is an apocalyptic number.

21311454858 is an abundant number, since it is smaller than the sum of its proper divisors (21324572502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311454858 is a wasteful number, since it uses less digits than its factorization.

21311454858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093141.

The product of its digits is 153600, while the sum is 42.

The spelling of 21311454858 in words is "twenty-one billion, three hundred eleven million, four hundred fifty-four thousand, eight hundred fifty-eight".