20150350220 has 288 divisors, whose sum is σ = 58816915584. Its totient is φ = 5638533120.

The previous prime is 20150350153. The next prime is 20150350243. The reversal of 20150350220 is 2205305102.

It is a super-2 number, since 2×20150350220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20150350192 and 20150350201.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8146904 + ... + 8149376.

Almost surely, 2^20150350220 is an apocalyptic number.

20150350220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20150350220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29408457792).

20150350220 is an abundant number, since it is smaller than the sum of its proper divisors (38666565364).

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

20150350220 is a wasteful number, since it uses less digits than its factorization.

20150350220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561 (or 2548 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 20150350220 its reverse (2205305102), we get a palindrome (22355655322).

The spelling of 20150350220 in words is "twenty billion, one hundred fifty million, three hundred fifty thousand, two hundred twenty".