21450411 has 12 divisors (see below), whose sum is σ = 32614920. Its totient is φ = 13547520.

The previous prime is 21450389. The next prime is 21450431. The reversal of 21450411 is 11405412.

It is not a de Polignac number, because 21450411 - 2⁶ = 21450347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21450431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62550 + ... + 62891.

It is an arithmetic number, because the mean of its divisors is an integer number (2717910).

Almost surely, 2^21450411 is an apocalyptic number.

21450411 is a deficient number, since it is larger than the sum of its proper divisors (11164509).

21450411 is a wasteful number, since it uses less digits than its factorization.

21450411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125466 (or 125463 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 21450411 is about 4631.4588414451. The cubic root of 21450411 is about 277.8509414330.

Adding to 21450411 its reverse (11405412), we get a palindrome (32855823).

It can be divided in two parts, 214 and 50411, that added together give a 4-th power (50625 = 15⁴).

The spelling of 21450411 in words is "twenty-one million, four hundred fifty thousand, four hundred eleven".