21167437054 has 12 divisors (see below), whose sum is σ = 32506732296. Its totient is φ = 10337583732.

The previous prime is 21167437037. The next prime is 21167437061. The reversal of 21167437054 is 45073476112.

It is a junction number, because it is equal to n+sod(n) for n = 21167436998 and 21167437016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2858314 + ... + 2865709.

It is an arithmetic number, because the mean of its divisors is an integer number (2708894358).

Almost surely, 2^21167437054 is an apocalyptic number.

21167437054 is a deficient number, since it is larger than the sum of its proper divisors (11339295242).

21167437054 is an equidigital number, since it uses as much as digits as its factorization.

21167437054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724111 (or 5724068 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 21167437054 in words is "twenty-one billion, one hundred sixty-seven million, four hundred thirty-seven thousand, fifty-four".