21385602 has 48 divisors (see below), whose sum is σ = 55748160. Its totient is φ = 5787936.

The previous prime is 21385597. The next prime is 21385603. The reversal of 21385602 is 20658312.

21385602 is a `hidden beast` number, since 21 + 38 + 5 + 602 = 666.

It is not an unprimeable number, because it can be changed into a prime (21385603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2073 + ... + 6860.

It is an arithmetic number, because the mean of its divisors is an integer number (1161420).

Almost surely, 2^21385602 is an apocalyptic number.

21385602 is an abundant number, since it is smaller than the sum of its proper divisors (34362558).

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

21385602 is a wasteful number, since it uses less digits than its factorization.

21385602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8967 (or 8964 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 21385602 is about 4624.4569410905. The cubic root of 21385602 is about 277.5708316874.

The spelling of 21385602 in words is "twenty-one million, three hundred eighty-five thousand, six hundred two".