20734672 has 20 divisors (see below), whose sum is σ = 45912736. Its totient is φ = 8886240.

The previous prime is 20734669. The next prime is 20734673. The reversal of 20734672 is 27643702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734673) 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 3 ways as a sum of consecutive naturals, for example, 92454 + ... + 92677.

Almost surely, 2^20734672 is an apocalyptic number.

It is an amenable number.

20734672 is an abundant number, since it is smaller than the sum of its proper divisors (25178064).

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

20734672 is a wasteful number, since it uses less digits than its factorization.

20734672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185146 (or 185140 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20734672 is about 4553.5340121712. The cubic root of 20734672 is about 274.7255531936.

The spelling of 20734672 in words is "twenty million, seven hundred thirty-four thousand, six hundred seventy-two".