21734769 has 8 divisors (see below), whose sum is σ = 33119680. Its totient is φ = 12419856.

The previous prime is 21734753. The next prime is 21734771. The reversal of 21734769 is 96743712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21734769 - 2⁴ = 21734753 is a prime.

It is a super-2 number, since 2×21734769² = 944800366966722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21734719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517474 + ... + 517515.

It is an arithmetic number, because the mean of its divisors is an integer number (4139960).

Almost surely, 2^21734769 is an apocalyptic number.

It is an amenable number.

21734769 is a deficient number, since it is larger than the sum of its proper divisors (11384911).

21734769 is a wasteful number, since it uses less digits than its factorization.

21734769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034999.

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

The square root of 21734769 is about 4662.0563059663. The cubic root of 21734769 is about 279.0733353809.

The spelling of 21734769 in words is "twenty-one million, seven hundred thirty-four thousand, seven hundred sixty-nine".