21326046 has 32 divisors (see below), whose sum is σ = 48906240. Its totient is φ = 6073056.

The previous prime is 21326021. The next prime is 21326069. The reversal of 21326046 is 64062312.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16035 + ... + 17313.

It is an arithmetic number, because the mean of its divisors is an integer number (1528320).

Almost surely, 2^21326046 is an apocalyptic number.

21326046 is an abundant number, since it is smaller than the sum of its proper divisors (27580194).

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

21326046 is a wasteful number, since it uses less digits than its factorization.

21326046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 21326046 is about 4618.0132091626. The cubic root of 21326046 is about 277.3129264267.

Adding to 21326046 its reverse (64062312), we get a palindrome (85388358).

The spelling of 21326046 in words is "twenty-one million, three hundred twenty-six thousand, forty-six".