21176130 has 16 divisors (see below), whose sum is σ = 50822784. Its totient is φ = 5646960.

The previous prime is 21176093. The next prime is 21176143. The reversal of 21176130 is 3167112.

It is a junction number, because it is equal to n+sod(n) for n = 21176097 and 21176106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352906 + ... + 352965.

It is an arithmetic number, because the mean of its divisors is an integer number (3176424).

Almost surely, 2^21176130 is an apocalyptic number.

21176130 is an abundant number, since it is smaller than the sum of its proper divisors (29646654).

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

21176130 is a wasteful number, since it uses less digits than its factorization.

21176130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705881.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 21176130 is about 4601.7529268747. The cubic root of 21176130 is about 276.6615876231.

It can be divided in two parts, 211761 and 30, that multiplied together give a triangular number (6352830 = T₃₅₆₄).

The spelling of 21176130 in words is "twenty-one million, one hundred seventy-six thousand, one hundred thirty".