21477412 has 24 divisors (see below), whose sum is σ = 41503392. Its totient is φ = 9643200.

The previous prime is 21477383. The next prime is 21477419.

21477412 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21477412² = 922558452435488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21477419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712 + ... + 6592.

It is an arithmetic number, because the mean of its divisors is an integer number (1729308).

Almost surely, 2^21477412 is an apocalyptic number.

21477412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21477412 is a deficient number, since it is larger than the sum of its proper divisors (20025980).

21477412 is a wasteful number, since it uses less digits than its factorization.

21477412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5979 (or 5977 counting only the distinct ones).

The product of its digits is 3136, while the sum is 28.

The square root of 21477412 is about 4634.3728809840. The cubic root of 21477412 is about 277.9674754490.

It can be divided in two parts, 2147 and 7412, that added together give a palindrome (9559).

The spelling of 21477412 in words is "twenty-one million, four hundred seventy-seven thousand, four hundred twelve".