21484955 has 8 divisors (see below), whose sum is σ = 26145504. Its totient is φ = 16945600.

The previous prime is 21484937. The next prime is 21484973. The reversal of 21484955 is 55948412.

It is an interprime number because it is at equal distance from previous prime (21484937) and next prime (21484973).

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

It is not a de Polignac number, because 21484955 - 2⁸ = 21484699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29906 + ... + 30615.

It is an arithmetic number, because the mean of its divisors is an integer number (3268188).

Almost surely, 2^21484955 is an apocalyptic number.

21484955 is a deficient number, since it is larger than the sum of its proper divisors (4660549).

21484955 is an equidigital number, since it uses as much as digits as its factorization.

21484955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60597.

The product of its digits is 57600, while the sum is 38.

The square root of 21484955 is about 4635.1866197598. The cubic root of 21484955 is about 278.0000129393. Note that the first 4 decimals are identical.

The spelling of 21484955 in words is "twenty-one million, four hundred eighty-four thousand, nine hundred fifty-five".