21449346 has 16 divisors (see below), whose sum is σ = 43896864. Its totient is φ = 6983424.

The previous prime is 21449297. The next prime is 21449353. The reversal of 21449346 is 64394412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41311 + ... + 41826.

It is an arithmetic number, because the mean of its divisors is an integer number (2743554).

Almost surely, 2^21449346 is an apocalyptic number.

21449346 is an abundant number, since it is smaller than the sum of its proper divisors (22447518).

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

21449346 is a wasteful number, since it uses less digits than its factorization.

21449346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83185.

The product of its digits is 20736, while the sum is 33.

The square root of 21449346 is about 4631.3438654455. The cubic root of 21449346 is about 277.8463429795.

The spelling of 21449346 in words is "twenty-one million, four hundred forty-nine thousand, three hundred forty-six".