21683036 has 24 divisors (see below), whose sum is σ = 39197760. Its totient is φ = 10487232.

The previous prime is 21683033. The next prime is 21683059. The reversal of 21683036 is 63038612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21683033) 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, 35066 + ... + 35678.

It is an arithmetic number, because the mean of its divisors is an integer number (1633240).

Almost surely, 2^21683036 is an apocalyptic number.

It is an amenable number.

21683036 is a deficient number, since it is larger than the sum of its proper divisors (17514724).

21683036 is a wasteful number, since it uses less digits than its factorization.

21683036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 21683036 is about 4656.5046977320. The cubic root of 21683036 is about 278.8517431084.

The spelling of 21683036 in words is "twenty-one million, six hundred eighty-three thousand, thirty-six".