20601550042 has 8 divisors (see below), whose sum is σ = 30977882100. Its totient is φ = 10275589344.

The previous prime is 20601550037. The next prime is 20601550049. The reversal of 20601550042 is 24005510602.

It can be written as a sum of positive squares in 2 ways, for example, as 20368712961 + 232837081 = 142719^2 + 15259^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20601549989 and 20601550016.

It is not an unprimeable number, because it can be changed into a prime (20601550049) 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, 12591817 + ... + 12593452.

Almost surely, 2^20601550042 is an apocalyptic number.

20601550042 is a deficient number, since it is larger than the sum of its proper divisors (10376332058).

20601550042 is a wasteful number, since it uses less digits than its factorization.

20601550042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25185680.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20601550042 in words is "twenty billion, six hundred one million, five hundred fifty thousand, forty-two".