21047334 has 32 divisors (see below), whose sum is σ = 52482816. Its totient is φ = 5466720.

The previous prime is 21047333. The next prime is 21047363. The reversal of 21047334 is 43374012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21047333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22317 + ... + 23240.

It is an arithmetic number, because the mean of its divisors is an integer number (1640088).

Almost surely, 2^21047334 is an apocalyptic number.

21047334 is an abundant number, since it is smaller than the sum of its proper divisors (31435482).

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

21047334 is a wasteful number, since it uses less digits than its factorization.

21047334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45580.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 21047334 is about 4587.7373508081. The cubic root of 21047334 is about 276.0995492609.

The spelling of 21047334 in words is "twenty-one million, forty-seven thousand, three hundred thirty-four".