2021900000 has 72 divisors (see below), whose sum is σ = 4975697160. Its totient is φ = 808720000.

The previous prime is 2021899993. The next prime is 2021900017. The reversal of 2021900000 is 91202.

It is a super-2 number, since 2×2021900000² = 8176159220000000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89891 + ... + 110109.

It is an arithmetic number, because the mean of its divisors is an integer number (69106905).

Almost surely, 2^2021900000 is an apocalyptic number.

2021900000 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 2021900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2487848580).

2021900000 is an abundant number, since it is smaller than the sum of its proper divisors (2953797160).

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

2021900000 is an frugal number, since it uses more digits than its factorization.

2021900000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20254 (or 20226 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2021900000 is about 44965.5423630139. The cubic root of 2021900000 is about 1264.5030777999.

Adding to 2021900000 its reverse (91202), we get a palindrome (2021991202).

The spelling of 2021900000 in words is "two billion, twenty-one million, nine hundred thousand".