20527638 has 32 divisors (see below), whose sum is σ = 45100800. Its totient is φ = 6199776.

The previous prime is 20527631. The next prime is 20527649. The reversal of 20527638 is 83672502.

It is a junction number, because it is equal to n+sod(n) for n = 20527599 and 20527608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20527631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1293 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (1409400).

Almost surely, 2^20527638 is an apocalyptic number.

20527638 is an abundant number, since it is smaller than the sum of its proper divisors (24573162).

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

20527638 is a wasteful number, since it uses less digits than its factorization.

20527638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20527638 is about 4530.7436475705. The cubic root of 20527638 is about 273.8081221847.

The spelling of 20527638 in words is "twenty million, five hundred twenty-seven thousand, six hundred thirty-eight".