21462534 has 24 divisors (see below), whose sum is σ = 49238280. Its totient is φ = 6733248.

The previous prime is 21462521. The next prime is 21462541. The reversal of 21462534 is 43526412.

21462534 is a `hidden beast` number, since 2 + 1 + 4 + 625 + 34 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21462498 and 21462507.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 34764 + ... + 35375.

It is an arithmetic number, because the mean of its divisors is an integer number (2051595).

Almost surely, 2^21462534 is an apocalyptic number.

21462534 is an abundant number, since it is smaller than the sum of its proper divisors (27775746).

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

21462534 is a wasteful number, since it uses less digits than its factorization.

21462534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70164 (or 70161 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 21462534 is about 4632.7674234738. The cubic root of 21462534 is about 277.9032753579.

Adding to 21462534 its reverse (43526412), we get a palindrome (64988946).

The spelling of 21462534 in words is "twenty-one million, four hundred sixty-two thousand, five hundred thirty-four".