21734466 has 64 divisors (see below), whose sum is σ = 51020928. Its totient is φ = 6110208.

The previous prime is 21734459. The next prime is 21734467. The reversal of 21734466 is 66443712.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21734467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48841 + ... + 49283.

It is an arithmetic number, because the mean of its divisors is an integer number (797202).

Almost surely, 2^21734466 is an apocalyptic number.

21734466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21734466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25510464).

21734466 is an abundant number, since it is smaller than the sum of its proper divisors (29286462).

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

21734466 is a wasteful number, since it uses less digits than its factorization.

21734466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515.

The product of its digits is 24192, while the sum is 33.

The square root of 21734466 is about 4662.0238094630. The cubic root of 21734466 is about 279.0720385400.

The spelling of 21734466 in words is "twenty-one million, seven hundred thirty-four thousand, four hundred sixty-six".