21469734 has 96 divisors (see below), whose sum is σ = 57657600. Its totient is φ = 5676480.

The previous prime is 21469733. The next prime is 21469739. The reversal of 21469734 is 43796412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21469733) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48687 + ... + 49125.

It is an arithmetic number, because the mean of its divisors is an integer number (600600).

Almost surely, 2^21469734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21469734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28828800).

21469734 is an abundant number, since it is smaller than the sum of its proper divisors (36187866).

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

21469734 is a wasteful number, since it uses less digits than its factorization.

21469734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 487 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 21469734 is about 4633.5444316419. The cubic root of 21469734 is about 277.9343477976.

The spelling of 21469734 in words is "twenty-one million, four hundred sixty-nine thousand, seven hundred thirty-four".