21146202 has 144 divisors (see below), whose sum is σ = 61414080. Its totient is φ = 5132160.

The previous prime is 21146197. The next prime is 21146207. The reversal of 21146202 is 20264112.

It is an interprime number because it is at equal distance from previous prime (21146197) and next prime (21146207).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (21146207) by changing a digit.

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 in 71 ways as a sum of consecutive naturals, for example, 289638 + ... + 289710.

Almost surely, 2^21146202 is an apocalyptic number.

21146202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a pronic number, being equal to 4598×4599.

It is a practical number, because each smaller number is the sum of distinct divisors of 21146202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30707040).

21146202 is an abundant number, since it is smaller than the sum of its proper divisors (40267878).

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

21146202 is a wasteful number, since it uses less digits than its factorization.

21146202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 21146202 is about 4598.4999728172. The cubic root of 21146202 is about 276.5311918787.

The spelling of 21146202 in words is "twenty-one million, one hundred forty-six thousand, two hundred two".