21478483 has 8 divisors (see below), whose sum is σ = 23623488. Its totient is φ = 19403904.

The previous prime is 21478453. The next prime is 21478489. The reversal of 21478483 is 38487412.

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

It is not a de Polignac number, because 21478483 - 2¹³ = 21470291 is a prime.

It is a super-2 number, since 2×21478483² = 922650463962578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21478489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16966 + ... + 18187.

It is an arithmetic number, because the mean of its divisors is an integer number (2952936).

Almost surely, 2^21478483 is an apocalyptic number.

21478483 is a deficient number, since it is larger than the sum of its proper divisors (2145005).

21478483 is a wasteful number, since it uses less digits than its factorization.

21478483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35213.

The product of its digits is 43008, while the sum is 37.

The square root of 21478483 is about 4634.4884291581. The cubic root of 21478483 is about 277.9720957793.

The spelling of 21478483 in words is "twenty-one million, four hundred seventy-eight thousand, four hundred eighty-three".