21841492 has 12 divisors (see below), whose sum is σ = 38263456. Its totient is φ = 10909080.

The previous prime is 21841489. The next prime is 21841537. The reversal of 21841492 is 29414812.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 2353 + ... + 7015.

Almost surely, 2^21841492 is an apocalyptic number.

It is an amenable number.

21841492 is a deficient number, since it is larger than the sum of its proper divisors (16421964).

21841492 is a wasteful number, since it uses less digits than its factorization.

21841492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5838 (or 5836 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 21841492 is about 4673.4882047567. The cubic root of 21841492 is about 279.5293624340.

The spelling of 21841492 in words is "twenty-one million, eight hundred forty-one thousand, four hundred ninety-two".