21319136 has 24 divisors (see below), whose sum is σ = 42225624. Its totient is φ = 10595200.

The previous prime is 21319127. The next prime is 21319169. The reversal of 21319136 is 63191312.

It is a super-3 number, since 3×21319136³ (a number of 23 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 3611 + ... + 7461.

It is an arithmetic number, because the mean of its divisors is an integer number (1759401).

Almost surely, 2^21319136 is an apocalyptic number.

It is an amenable number.

21319136 is a deficient number, since it is larger than the sum of its proper divisors (20906488).

21319136 is a wasteful number, since it uses less digits than its factorization.

21319136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034 (or 4026 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 21319136 is about 4617.2649913125. The cubic root of 21319136 is about 277.2829718300.

The spelling of 21319136 in words is "twenty-one million, three hundred nineteen thousand, one hundred thirty-six".