20601550000 has 60 divisors (see below), whose sum is σ = 49891306752. Its totient is φ = 8240600000.

The previous prime is 20601549931. The next prime is 20601550001. The reversal of 20601550000 is 5510602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20601550000.

It is not an unprimeable number, because it can be changed into a prime (20601550001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156016 + ... + 256015.

Almost surely, 2^20601550000 is an apocalyptic number.

20601550000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20601550000 is an abundant number, since it is smaller than the sum of its proper divisors (29289756752).

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

20601550000 is an frugal number, since it uses more digits than its factorization.

20601550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412064 (or 412038 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The spelling of 20601550000 in words is "twenty billion, six hundred one million, five hundred fifty thousand".