20618932 has 6 divisors (see below), whose sum is σ = 36083138. Its totient is φ = 10309464.

The previous prime is 20618929. The next prime is 20618959. The reversal of 20618932 is 23981602.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 224676 = 4516^2 + 474^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20618894 and 20618903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2577363 + ... + 2577370.

Almost surely, 2^20618932 is an apocalyptic number.

It is an amenable number.

20618932 is a deficient number, since it is larger than the sum of its proper divisors (15464206).

20618932 is a wasteful number, since it uses less digits than its factorization.

20618932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154737 (or 5154735 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20618932 is about 4540.8074171892. The cubic root of 20618932 is about 274.2134305949.

The spelling of 20618932 in words is "twenty million, six hundred eighteen thousand, nine hundred thirty-two".