21410136 has 64 divisors (see below), whose sum is σ = 64886400. Its totient is φ = 6487200.

The previous prime is 21410117. The next prime is 21410141. The reversal of 21410136 is 63101412.

It is a happy number.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2130 + ... + 6881.

It is an arithmetic number, because the mean of its divisors is an integer number (1013850).

Almost surely, 2^21410136 is an apocalyptic number.

It is an amenable number.

21410136 is an abundant number, since it is smaller than the sum of its proper divisors (43476264).

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

21410136 is a wasteful number, since it uses less digits than its factorization.

21410136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9037 (or 9027 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21410136 is about 4627.1088165290. The cubic root of 21410136 is about 277.6769361011.

Adding to 21410136 its reverse (63101412), we get a palindrome (84511548).

The spelling of 21410136 in words is "twenty-one million, four hundred ten thousand, one hundred thirty-six".