20010023220 has 96 divisors (see below), whose sum is σ = 63093252096. Its totient is φ = 4694428800.

The previous prime is 20010023219. The next prime is 20010023233. The reversal of 20010023220 is 2232001002.

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 = 20010023196 and 20010023205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468544 + ... + 509463.

It is an arithmetic number, because the mean of its divisors is an integer number (657221376).

Almost surely, 2^20010023220 is an apocalyptic number.

20010023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010023220 is an abundant number, since it is smaller than the sum of its proper divisors (43083228876).

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

20010023220 is a wasteful number, since it uses less digits than its factorization.

20010023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978061 (or 978059 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20010023220 its reverse (2232001002), we get a palindrome (22242024222).

The spelling of 20010023220 in words is "twenty billion, ten million, twenty-three thousand, two hundred twenty".