21435052 has 6 divisors (see below), whose sum is σ = 37511348. Its totient is φ = 10717524.

The previous prime is 21435049. The next prime is 21435061. The reversal of 21435052 is 25053412.

It is a super-2 number, since 2×21435052² = 918922908485408, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 2679378 + ... + 2679385.

Almost surely, 2^21435052 is an apocalyptic number.

It is an amenable number.

21435052 is a deficient number, since it is larger than the sum of its proper divisors (16076296).

21435052 is a wasteful number, since it uses less digits than its factorization.

21435052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358767 (or 5358765 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 21435052 is about 4629.8004276642. The cubic root of 21435052 is about 277.7846096572.

Adding to 21435052 its reverse (25053412), we get a palindrome (46488464).

The spelling of 21435052 in words is "twenty-one million, four hundred thirty-five thousand, fifty-two".