2145020416 has 80 divisors (see below), whose sum is σ = 5343497280. Its totient is φ = 835706880.

The previous prime is 2145020401. The next prime is 2145020419. The reversal of 2145020416 is 6140205412.

It is a happy number.

It is a super-2 number, since 2×2145020416² = 9202225170113626112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2145020419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12220 + ... + 66628.

It is an arithmetic number, because the mean of its divisors is an integer number (66793716).

Almost surely, 2^2145020416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145020416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2671748640).

2145020416 is an abundant number, since it is smaller than the sum of its proper divisors (3198476864).

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

2145020416 is an equidigital number, since it uses as much as digits as its factorization.

2145020416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54445 (or 54429 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2145020416 is about 46314.3651149403. The cubic root of 2145020416 is about 1289.6656818486.

Adding to 2145020416 its reverse (6140205412), we get a palindrome (8285225828).

The spelling of 2145020416 in words is "two billion, one hundred forty-five million, twenty thousand, four hundred sixteen".