21472411 has 12 divisors (see below), whose sum is σ = 22988160. Its totient is φ = 20051840.

The previous prime is 21472403. The next prime is 21472417. The reversal of 21472411 is 11427412.

It is not a de Polignac number, because 21472411 - 2³ = 21472403 is a prime.

It is a super-2 number, since 2×21472411² = 922128868305842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21472417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55005 + ... + 55393.

It is an arithmetic number, because the mean of its divisors is an integer number (1915680).

Almost surely, 2^21472411 is an apocalyptic number.

21472411 is a deficient number, since it is larger than the sum of its proper divisors (1515749).

21472411 is a wasteful number, since it uses less digits than its factorization.

21472411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 597 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 21472411 is about 4633.8332943687. The cubic root of 21472411 is about 277.9458989317.

Adding to 21472411 its reverse (11427412), we get a palindrome (32899823).

The spelling of 21472411 in words is "twenty-one million, four hundred seventy-two thousand, four hundred eleven".