21202000 has 40 divisors (see below), whose sum is σ = 51271272. Its totient is φ = 8480000.

The previous prime is 21201997. The next prime is 21202001. The reversal of 21202000 is 20212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5184 + 21196816 = 72^2 + 4604^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202001) 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, 3301 + ... + 7300.

Almost surely, 2^21202000 is an apocalyptic number.

21202000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202000 is an abundant number, since it is smaller than the sum of its proper divisors (30069272).

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

21202000 is a wasteful number, since it uses less digits than its factorization.

21202000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10624 (or 10608 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 21202000 is about 4604.5629542878. The cubic root of 21202000 is about 276.7742037728.

Adding to 21202000 its reverse (20212), we get a palindrome (21222212).

The spelling of 21202000 in words is "twenty-one million, two hundred two thousand".