21734976 has 56 divisors (see below), whose sum is σ = 60899040. Its totient is φ = 6817792.

The previous prime is 21734969. The next prime is 21734981. The reversal of 21734976 is 67943712.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 66 + ... + 6593.

Almost surely, 2^21734976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21734976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30449520).

21734976 is an abundant number, since it is smaller than the sum of its proper divisors (39164064).

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

21734976 is a wasteful number, since it uses less digits than its factorization.

21734976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6691 (or 6681 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 21734976 is about 4662.0785064175. The cubic root of 21734976 is about 279.0742213346.

The spelling of 21734976 in words is "twenty-one million, seven hundred thirty-four thousand, nine hundred seventy-six".