21874232 has 8 divisors (see below), whose sum is σ = 41014200. Its totient is φ = 10937112.

The previous prime is 21874199. The next prime is 21874241. The reversal of 21874232 is 23247812.

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

It is a junction number, because it is equal to n+sod(n) for n = 21874195 and 21874204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1367132 + ... + 1367147.

It is an arithmetic number, because the mean of its divisors is an integer number (5126775).

Almost surely, 2^21874232 is an apocalyptic number.

It is an amenable number.

21874232 is a deficient number, since it is larger than the sum of its proper divisors (19139968).

21874232 is a wasteful number, since it uses less digits than its factorization.

21874232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734285 (or 2734281 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 21874232 is about 4676.9896300933. The cubic root of 21874232 is about 279.6689625178.

The spelling of 21874232 in words is "twenty-one million, eight hundred seventy-four thousand, two hundred thirty-two".