21435058 has 4 divisors (see below), whose sum is σ = 32152590. Its totient is φ = 10717528.

The previous prime is 21435049. The next prime is 21435061. The reversal of 21435058 is 85053412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20912329 + 522729 = 4573^2 + 723^2 .

It is a super-2 number, since 2×21435058² = 918923422926728, 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, 5358763 + ... + 5358766.

Almost surely, 2^21435058 is an apocalyptic number.

21435058 is a deficient number, since it is larger than the sum of its proper divisors (10717532).

21435058 is a wasteful number, since it uses less digits than its factorization.

21435058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10717531.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 21435058 is about 4629.8010756403. The cubic root of 21435058 is about 277.7846355759.

The spelling of 21435058 in words is "twenty-one million, four hundred thirty-five thousand, fifty-eight".