21474485 has 8 divisors (see below), whose sum is σ = 27285336. Its totient is φ = 16168960.

The previous prime is 21474473. The next prime is 21474499. The reversal of 21474485 is 58447412.

It can be written as a sum of positive squares in 4 ways, for example, as 470596 + 21003889 = 686^2 + 4583^2 .

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

It is not a de Polignac number, because 21474485 - 2⁶ = 21474421 is a prime.

It is a super-2 number, since 2×21474485² = 922307012030450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 126236 + ... + 126405.

It is an arithmetic number, because the mean of its divisors is an integer number (3410667).

Almost surely, 2^21474485 is an apocalyptic number.

It is an amenable number.

21474485 is a deficient number, since it is larger than the sum of its proper divisors (5810851).

21474485 is a wasteful number, since it uses less digits than its factorization.

21474485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252663.

The product of its digits is 35840, while the sum is 35.

The square root of 21474485 is about 4634.0570777667. The cubic root of 21474485 is about 277.9548474879.

The spelling of 21474485 in words is "twenty-one million, four hundred seventy-four thousand, four hundred eighty-five".