21450046 has 8 divisors (see below), whose sum is σ = 32428800. Its totient is φ = 10640448.

The previous prime is 21450029. The next prime is 21450061. The reversal of 21450046 is 64005412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21449999 and 21450026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41971 + ... + 42478.

It is an arithmetic number, because the mean of its divisors is an integer number (4053600).

Almost surely, 2^21450046 is an apocalyptic number.

21450046 is a deficient number, since it is larger than the sum of its proper divisors (10978754).

21450046 is a wasteful number, since it uses less digits than its factorization.

21450046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84578.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 21450046 is about 4631.4194368465. The cubic root of 21450046 is about 277.8493654543.

Adding to 21450046 its reverse (64005412), we get a palindrome (85455458).

It can be divided in two parts, 2 and 1450046, that multiplied together give a palindrome (2900092).

The spelling of 21450046 in words is "twenty-one million, four hundred fifty thousand, forty-six".