20791332 has 18 divisors (see below), whose sum is σ = 52555958. Its totient is φ = 6930432.

The previous prime is 20791291. The next prime is 20791363. The reversal of 20791332 is 23319702.

It can be written as a sum of positive squares in only one way, i.e., 18870336 + 1920996 = 4344^2 + 1386^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 20791296 and 20791305.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 288733 + ... + 288804.

Almost surely, 2^20791332 is an apocalyptic number.

It is an amenable number.

20791332 is an abundant number, since it is smaller than the sum of its proper divisors (31764626).

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

20791332 is a wasteful number, since it uses less digits than its factorization.

20791332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577547 (or 577542 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20791332 is about 4559.7513090080. The cubic root of 20791332 is about 274.9755658731.

Adding to 20791332 its product of nonzero digits (2268), we get a square (20793600 = 4560²).

The spelling of 20791332 in words is "twenty million, seven hundred ninety-one thousand, three hundred thirty-two".