21954283 has 12 divisors (see below), whose sum is σ = 24422448. Its totient is φ = 19712160.

The previous prime is 21954281. The next prime is 21954287. The reversal of 21954283 is 38245912.

It is not a de Polignac number, because 21954283 - 2¹ = 21954281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21954281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4498 + ... + 8008.

It is an arithmetic number, because the mean of its divisors is an integer number (2035204).

Almost surely, 2^21954283 is an apocalyptic number.

21954283 is a deficient number, since it is larger than the sum of its proper divisors (2468165).

21954283 is a wasteful number, since it uses less digits than its factorization.

21954283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574 (or 3561 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 21954283 is about 4685.5397768027. The cubic root of 21954283 is about 280.0097062962.

The spelling of 21954283 in words is "twenty-one million, nine hundred fifty-four thousand, two hundred eighty-three".