21852054 has 24 divisors (see below), whose sum is σ = 54110160. Its totient is φ = 6243408.

The previous prime is 21852037. The next prime is 21852067. The reversal of 21852054 is 45025812.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86589 + ... + 86840.

It is an arithmetic number, because the mean of its divisors is an integer number (2254590).

Almost surely, 2^21852054 is an apocalyptic number.

21852054 is an abundant number, since it is smaller than the sum of its proper divisors (32258106).

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

21852054 is a wasteful number, since it uses less digits than its factorization.

21852054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173444 (or 173441 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 21852054 is about 4674.6180592643. The cubic root of 21852054 is about 279.5744129790.

Adding to 21852054 its reverse (45025812), we get a palindrome (66877866).

The spelling of 21852054 in words is "twenty-one million, eight hundred fifty-two thousand, fifty-four".