21468477 has 8 divisors (see below), whose sum is σ = 28684000. Its totient is φ = 14282640.

The previous prime is 21468463. The next prime is 21468511. The reversal of 21468477 is 77486412.

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

It is not a de Polignac number, because 21468477 - 2⁶ = 21468413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21468437) 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, 5674 + ... + 8667.

It is an arithmetic number, because the mean of its divisors is an integer number (3585500).

Almost surely, 2^21468477 is an apocalyptic number.

It is an amenable number.

21468477 is a deficient number, since it is larger than the sum of its proper divisors (7215523).

21468477 is a wasteful number, since it uses less digits than its factorization.

21468477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14843.

The product of its digits is 75264, while the sum is 39.

The square root of 21468477 is about 4633.4087883544. The cubic root of 21468477 is about 277.9289235681.

It can be divided in two parts, 21468 and 477, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 21468477 in words is "twenty-one million, four hundred sixty-eight thousand, four hundred seventy-seven".