20734471 has 8 divisors (see below), whose sum is σ = 21288960. Its totient is φ = 20183352.

The previous prime is 20734463. The next prime is 20734487. The reversal of 20734471 is 17443702.

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

It is a cyclic number.

It is not a de Polignac number, because 20734471 - 2³ = 20734463 is a prime.

It is a super-3 number, since 3×20734471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15840 + ... + 17098.

It is an arithmetic number, because the mean of its divisors is an integer number (2661120).

Almost surely, 2^20734471 is an apocalyptic number.

20734471 is a deficient number, since it is larger than the sum of its proper divisors (554489).

20734471 is a wasteful number, since it uses less digits than its factorization.

20734471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 20734471 is about 4553.5119413481. The cubic root of 20734471 is about 274.7246654694.

The spelling of 20734471 in words is "twenty million, seven hundred thirty-four thousand, four hundred seventy-one".