21146532 has 24 divisors (see below), whose sum is σ = 53827872. Its totient is φ = 6408000.

The previous prime is 21146519. The next prime is 21146533. The reversal of 21146532 is 23564112.

It is not an unprimeable number, because it can be changed into a prime (21146533) by changing a digit.

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, 79969 + ... + 80232.

It is an arithmetic number, because the mean of its divisors is an integer number (2242828).

Almost surely, 2^21146532 is an apocalyptic number.

21146532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21146532 is an abundant number, since it is smaller than the sum of its proper divisors (32681340).

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

21146532 is a wasteful number, since it uses less digits than its factorization.

21146532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160219 (or 160217 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 21146532 is about 4598.5358539431. The cubic root of 21146532 is about 276.5326303532.

It can be divided in two parts, 2114 and 6532, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 21146532 in words is "twenty-one million, one hundred forty-six thousand, five hundred thirty-two".