20972134 has 8 divisors (see below), whose sum is σ = 31607928. Its totient is φ = 10436160.

The previous prime is 20972129. The next prime is 20972137. The reversal of 20972134 is 43127902.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20972137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24427 + ... + 25270.

It is an arithmetic number, because the mean of its divisors is an integer number (3950991).

Almost surely, 2^20972134 is an apocalyptic number.

20972134 is a deficient number, since it is larger than the sum of its proper divisors (10635794).

20972134 is a wasteful number, since it uses less digits than its factorization.

20972134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49910.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20972134 is about 4579.5342557950. The cubic root of 20972134 is about 275.7703315879.

The spelling of 20972134 in words is "twenty million, nine hundred seventy-two thousand, one hundred thirty-four".