21854632 has 16 divisors (see below), whose sum is σ = 42390900. Its totient is φ = 10550400.

The previous prime is 21854629. The next prime is 21854633. The reversal of 21854632 is 23645812.

It can be written as a sum of positive squares in 2 ways, for example, as 20921476 + 933156 = 4574^2 + 966^2 .

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 21854594 and 21854603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21854633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46869 + ... + 47332.

Almost surely, 2^21854632 is an apocalyptic number.

It is an amenable number.

21854632 is a deficient number, since it is larger than the sum of its proper divisors (20536268).

21854632 is a wasteful number, since it uses less digits than its factorization.

21854632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94236 (or 94232 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 21854632 is about 4674.8937955851. The cubic root of 21854632 is about 279.5854068272.

The spelling of 21854632 in words is "twenty-one million, eight hundred fifty-four thousand, six hundred thirty-two".