20011322220 has 48 divisors (see below), whose sum is σ = 56214267648. Its totient is φ = 5318965440.

The previous prime is 20011322209. The next prime is 20011322231. The reversal of 20011322220 is 2222311002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20011322209) and next prime (20011322231).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20011322220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524776 + ... + 561615.

It is an arithmetic number, because the mean of its divisors is an integer number (1171130576).

Almost surely, 2^20011322220 is an apocalyptic number.

20011322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011322220 is an abundant number, since it is smaller than the sum of its proper divisors (36202945428).

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

20011322220 is a wasteful number, since it uses less digits than its factorization.

20011322220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086710 (or 1086708 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20011322220 its reverse (2222311002), we get a palindrome (22233633222).

The spelling of 20011322220 in words is "twenty billion, eleven million, three hundred twenty-two thousand, two hundred twenty".