21734416 has 20 divisors (see below), whose sum is σ = 45939024. Its totient is φ = 9879200.

The previous prime is 21734411. The next prime is 21734417. The reversal of 21734416 is 61443712.

It is a super-2 number, since 2×21734416² = 944769677722112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21734411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61570 + ... + 61921.

Almost surely, 2^21734416 is an apocalyptic number.

It is an amenable number.

21734416 is an abundant number, since it is smaller than the sum of its proper divisors (24204608).

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

21734416 is a wasteful number, since it uses less digits than its factorization.

21734416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123510 (or 123504 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 21734416 is about 4662.0184469820. The cubic root of 21734416 is about 279.0718245387.

It can be divided in two parts, 21 and 734416, that added together give a palindrome (734437).

The spelling of 21734416 in words is "twenty-one million, seven hundred thirty-four thousand, four hundred sixteen".