21302000 has 40 divisors (see below), whose sum is σ = 51513072. Its totient is φ = 8520000.

The previous prime is 21301997. The next prime is 21302027. The reversal of 21302000 is 20312.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3326 + ... + 7325.

Almost surely, 2^21302000 is an apocalyptic number.

21302000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302000 is an abundant number, since it is smaller than the sum of its proper divisors (30211072).

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

21302000 is a wasteful number, since it uses less digits than its factorization.

21302000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10674 (or 10658 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 21302000 is about 4615.4089742947. The cubic root of 21302000 is about 277.2086599592.

Adding to 21302000 its reverse (20312), we get a palindrome (21322312).

The spelling of 21302000 in words is "twenty-one million, three hundred two thousand".