2045544420 has 24 divisors (see below), whose sum is σ = 5727524544. Its totient is φ = 545478496.

The previous prime is 2045544373. The next prime is 2045544437. The reversal of 2045544420 is 244455402.

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

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, 17046144 + ... + 17046263.

It is an arithmetic number, because the mean of its divisors is an integer number (238646856).

Almost surely, 2^2045544420 is an apocalyptic number.

2045544420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2045544420 is an abundant number, since it is smaller than the sum of its proper divisors (3681980124).

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

2045544420 is a wasteful number, since it uses less digits than its factorization.

2045544420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34092419 (or 34092417 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

The square root of 2045544420 is about 45227.6952762353. The cubic root of 2045544420 is about 1269.4130877688.

Adding to 2045544420 its reverse (244455402), we get a palindrome (2289999822).

The spelling of 2045544420 in words is "two billion, forty-five million, five hundred forty-four thousand, four hundred twenty".