20911952 has 10 divisors (see below), whose sum is σ = 40516938. Its totient is φ = 10455968.

The previous prime is 20911931. The next prime is 20911963. The reversal of 20911952 is 25911902.

It can be written as a sum of positive squares in only one way, i.e., 17007376 + 3904576 = 4124^2 + 1976^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 653483 + ... + 653514.

Almost surely, 2^20911952 is an apocalyptic number.

It is an amenable number.

20911952 is a deficient number, since it is larger than the sum of its proper divisors (19604986).

20911952 is a wasteful number, since it uses less digits than its factorization.

20911952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307005 (or 1306999 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 20911952 is about 4572.9587796087. The cubic root of 20911952 is about 275.5062937529.

The spelling of 20911952 in words is "twenty million, nine hundred eleven thousand, nine hundred fifty-two".