21854432 has 12 divisors (see below), whose sum is σ = 43025976. Its totient is φ = 10927200.

The previous prime is 21854431. The next prime is 21854461. The reversal of 21854432 is 23445812.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21854395 and 21854404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21854431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341444 + ... + 341507.

It is an arithmetic number, because the mean of its divisors is an integer number (3585498).

Almost surely, 2^21854432 is an apocalyptic number.

It is an amenable number.

21854432 is a deficient number, since it is larger than the sum of its proper divisors (21171544).

21854432 is an equidigital number, since it uses as much as digits as its factorization.

21854432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682961 (or 682953 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 21854432 is about 4674.8724046759. The cubic root of 21854432 is about 279.5845539607.

The spelling of 21854432 in words is "twenty-one million, eight hundred fifty-four thousand, four hundred thirty-two".