21835672 has 8 divisors (see below), whose sum is σ = 40941900. Its totient is φ = 10917832.

The previous prime is 21835663. The next prime is 21835699. The reversal of 21835672 is 27653812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364722 + ... + 1364737.

Almost surely, 2^21835672 is an apocalyptic number.

It is an amenable number.

21835672 is a deficient number, since it is larger than the sum of its proper divisors (19106228).

21835672 is a wasteful number, since it uses less digits than its factorization.

21835672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729465 (or 2729461 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 21835672 is about 4672.8655020234. The cubic root of 21835672 is about 279.5045319354.

The spelling of 21835672 in words is "twenty-one million, eight hundred thirty-five thousand, six hundred seventy-two".