21449080 has 16 divisors (see below), whose sum is σ = 48260520. Its totient is φ = 8579616.

The previous prime is 21448961. The next prime is 21449083. The reversal of 21449080 is 8094412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21449083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268074 + ... + 268153.

Almost surely, 2^21449080 is an apocalyptic number.

21449080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21449080 is an abundant number, since it is smaller than the sum of its proper divisors (26811440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21449080 is a wasteful number, since it uses less digits than its factorization.

21449080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536238 (or 536234 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 21449080 is about 4631.3151479898. The cubic root of 21449080 is about 277.8451944218.

It can be divided in two parts, 214 and 49080, that added together give a palindrome (49294).

The spelling of 21449080 in words is "twenty-one million, four hundred forty-nine thousand, eighty".