2222381820 has 24 divisors (see below), whose sum is σ = 6222669264. Its totient is φ = 592635136.

The previous prime is 2222381813. The next prime is 2222381897. The reversal of 2222381820 is 281832222.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 18519789 + ... + 18519908.

It is an arithmetic number, because the mean of its divisors is an integer number (259277886).

Almost surely, 2^2222381820 is an apocalyptic number.

2222381820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2222381820 is an abundant number, since it is smaller than the sum of its proper divisors (4000287444).

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

2222381820 is a wasteful number, since it uses less digits than its factorization.

2222381820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37039709 (or 37039707 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 2222381820 is about 47142.1448387746. The cubic root of 2222381820 is about 1304.9871198506.

The spelling of 2222381820 in words is "two billion, two hundred twenty-two million, three hundred eighty-one thousand, eight hundred twenty".