20100005220 has 24 divisors (see below), whose sum is σ = 56280014784. Its totient is φ = 5360001376.

The previous prime is 20100005161. The next prime is 20100005239. The reversal of 20100005220 is 2250000102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20100005196 and 20100005205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167499984 + ... + 167500103.

It is an arithmetic number, because the mean of its divisors is an integer number (2345000616).

Almost surely, 2^20100005220 is an apocalyptic number.

20100005220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100005220 is an abundant number, since it is smaller than the sum of its proper divisors (36180009564).

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

20100005220 is a wasteful number, since it uses less digits than its factorization.

20100005220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335000099 (or 335000097 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

Adding to 20100005220 its reverse (2250000102), we get a palindrome (22350005322).

The spelling of 20100005220 in words is "twenty billion, one hundred million, five thousand, two hundred twenty".