20157832 has 8 divisors (see below), whose sum is σ = 37795950. Its totient is φ = 10078912.

The previous prime is 20157817. The next prime is 20157833. The reversal of 20157832 is 23875102.

It can be written as a sum of positive squares in only one way, i.e., 17355556 + 2802276 = 4166^2 + 1674^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20157832.

It is not an unprimeable number, because it can be changed into a prime (20157833) 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 as a sum of consecutive naturals, namely, 1259857 + ... + 1259872.

Almost surely, 2^20157832 is an apocalyptic number.

It is an amenable number.

20157832 is a deficient number, since it is larger than the sum of its proper divisors (17638118).

20157832 is a wasteful number, since it uses less digits than its factorization.

20157832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519735 (or 2519731 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20157832 is about 4489.7474316491. The cubic root of 20157832 is about 272.1539281563.

The spelling of 20157832 in words is "twenty million, one hundred fifty-seven thousand, eight hundred thirty-two".