21714448 has 30 divisors (see below), whose sum is σ = 48942366. Its totient is φ = 9305856.

The previous prime is 21714443. The next prime is 21714479. The reversal of 21714448 is 84441712.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12054784 + 9659664 = 3472^2 + 3108^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21714443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13065 + ... + 14632.

Almost surely, 2^21714448 is an apocalyptic number.

21714448 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21714448 is an abundant number, since it is smaller than the sum of its proper divisors (27227918).

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

21714448 is a wasteful number, since it uses less digits than its factorization.

21714448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27719 (or 27706 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 21714448 is about 4659.8763932104. The cubic root of 21714448 is about 278.9863347238.

The spelling of 21714448 in words is "twenty-one million, seven hundred fourteen thousand, four hundred forty-eight".