21450104 has 16 divisors (see below), whose sum is σ = 43312920. Its totient is φ = 9900000.

The previous prime is 21450103. The next prime is 21450113. The reversal of 21450104 is 40105412.

It is a super-2 number, since 2×21450104² = 920213923221632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450103) 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 3 ways as a sum of consecutive naturals, for example, 103022 + ... + 103229.

Almost surely, 2^21450104 is an apocalyptic number.

It is an amenable number.

21450104 is an abundant number, since it is smaller than the sum of its proper divisors (21862816).

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

21450104 is a wasteful number, since it uses less digits than its factorization.

21450104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206270 (or 206266 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21450104 is about 4631.4256984216. The cubic root of 21450104 is about 277.8496158850.

Adding to 21450104 its reverse (40105412), we get a palindrome (61555516).

The spelling of 21450104 in words is "twenty-one million, four hundred fifty thousand, one hundred four".