21467406 has 16 divisors (see below), whose sum is σ = 43933824. Its totient is φ = 6989304.

The previous prime is 21467399. The next prime is 21467419. The reversal of 21467406 is 60476412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41346 + ... + 41861.

It is an arithmetic number, because the mean of its divisors is an integer number (2745864).

Almost surely, 2^21467406 is an apocalyptic number.

21467406 is an abundant number, since it is smaller than the sum of its proper divisors (22466418).

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

21467406 is a wasteful number, since it uses less digits than its factorization.

21467406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83255.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 21467406 is about 4633.2932132556. The cubic root of 21467406 is about 277.9243018022.

The spelling of 21467406 in words is "twenty-one million, four hundred sixty-seven thousand, four hundred six".