20956132 has 6 divisors (see below), whose sum is σ = 36673238. Its totient is φ = 10478064.

The previous prime is 20956129. The next prime is 20956139. The reversal of 20956132 is 23165902.

It can be written as a sum of positive squares in only one way, i.e., 18113536 + 2842596 = 4256^2 + 1686^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20956132.

It is not an unprimeable number, because it can be changed into a prime (20956139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619513 + ... + 2619520.

Almost surely, 2^20956132 is an apocalyptic number.

It is an amenable number.

20956132 is a deficient number, since it is larger than the sum of its proper divisors (15717106).

20956132 is a wasteful number, since it uses less digits than its factorization.

20956132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239037 (or 5239035 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 20956132 is about 4577.7868015014. The cubic root of 20956132 is about 275.7001750064.

The spelling of 20956132 in words is "twenty million, nine hundred fifty-six thousand, one hundred thirty-two".