20538632 has 16 divisors (see below), whose sum is σ = 40184640. Its totient is φ = 9822736.

The previous prime is 20538631. The next prime is 20538643. The reversal of 20538632 is 23683502.

It is a junction number, because it is equal to n+sod(n) for n = 20538595 and 20538604.

It is not an unprimeable number, because it can be changed into a prime (20538631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55628 + ... + 55995.

It is an arithmetic number, because the mean of its divisors is an integer number (2511540).

Almost surely, 2^20538632 is an apocalyptic number.

It is an amenable number.

20538632 is a deficient number, since it is larger than the sum of its proper divisors (19646008).

20538632 is a wasteful number, since it uses less digits than its factorization.

20538632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111652 (or 111648 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20538632 is about 4531.9567517795. The cubic root of 20538632 is about 273.8569946569.

The spelling of 20538632 in words is "twenty million, five hundred thirty-eight thousand, six hundred thirty-two".