21854950 has 24 divisors (see below), whose sum is σ = 43778448. Its totient is φ = 8069280.

The previous prime is 21854947. The next prime is 21854977. The reversal of 21854950 is 5945812.

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, 16162 + ... + 17461.

It is an arithmetic number, because the mean of its divisors is an integer number (1824102).

Almost surely, 2^21854950 is an apocalyptic number.

21854950 is an abundant number, since it is smaller than the sum of its proper divisors (21923498).

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

21854950 is a wasteful number, since it uses less digits than its factorization.

21854950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33648 (or 33643 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 21854950 is about 4674.9278069292. The cubic root of 21854950 is about 279.5867628743.

The spelling of 21854950 in words is "twenty-one million, eight hundred fifty-four thousand, nine hundred fifty".