21435068 has 24 divisors (see below), whose sum is σ = 38198160. Its totient is φ = 10523520.

The previous prime is 21435061. The next prime is 21435077. The reversal of 21435068 is 86053412.

It is a self number, because there is not a number n which added to its sum of digits gives 21435068.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91880 + ... + 92112.

It is an arithmetic number, because the mean of its divisors is an integer number (1591590).

Almost surely, 2^21435068 is an apocalyptic number.

It is an amenable number.

21435068 is a deficient number, since it is larger than the sum of its proper divisors (16763092).

21435068 is a wasteful number, since it uses less digits than its factorization.

21435068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 21435068 is about 4629.8021556002. The cubic root of 21435068 is about 277.7846787737.

The spelling of 21435068 in words is "twenty-one million, four hundred thirty-five thousand, sixty-eight".