21837054 has 8 divisors (see below), whose sum is σ = 43674120. Its totient is φ = 7279016.

The previous prime is 21837043. The next prime is 21837059. The reversal of 21837054 is 45073812.

It is a sphenic number, since it is the product of 3 distinct primes.

21837054 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21837059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1819749 + ... + 1819760.

It is an arithmetic number, because the mean of its divisors is an integer number (5459265).

Almost surely, 2^21837054 is an apocalyptic number.

21837054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21837054 is a wasteful number, since it uses less digits than its factorization.

21837054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639514.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 21837054 is about 4673.0133746866. The cubic root of 21837054 is about 279.5104285116.

The spelling of 21837054 in words is "twenty-one million, eight hundred thirty-seven thousand, fifty-four".