20601538 has 8 divisors (see below), whose sum is σ = 30921660. Its totient is φ = 10294320.

The previous prime is 20601533. The next prime is 20601547. The reversal of 20601538 is 83510602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20043529 + 558009 = 4477^2 + 747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20601533) 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, 4048 + ... + 7588.

Almost surely, 2^20601538 is an apocalyptic number.

20601538 is a deficient number, since it is larger than the sum of its proper divisors (10320122).

20601538 is a wasteful number, since it uses less digits than its factorization.

20601538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20601538 is about 4538.8917149454. The cubic root of 20601538 is about 274.1363006662.

The spelling of 20601538 in words is "twenty million, six hundred one thousand, five hundred thirty-eight".