21948854 has 8 divisors (see below), whose sum is σ = 34354800. Its totient is φ = 10497256.

The previous prime is 21948851. The next prime is 21948863. The reversal of 21948854 is 45884912.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21948851) 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, 238529 + ... + 238620.

It is an arithmetic number, because the mean of its divisors is an integer number (4294350).

Almost surely, 2^21948854 is an apocalyptic number.

21948854 is a deficient number, since it is larger than the sum of its proper divisors (12405946).

21948854 is a wasteful number, since it uses less digits than its factorization.

21948854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477174.

The product of its digits is 92160, while the sum is 41.

The square root of 21948854 is about 4684.9604053823. The cubic root of 21948854 is about 279.9866235106.

It can be divided in two parts, 219488 and 54, that multiplied together give a cube (11852352 = 228³).

The spelling of 21948854 in words is "twenty-one million, nine hundred forty-eight thousand, eight hundred fifty-four".