45450042020 has 12 divisors (see below), whose sum is σ = 95445088284. Its totient is φ = 18180016800.

The previous prime is 45450041953. The next prime is 45450042023. The reversal of 45450042020 is 2024005454.

It can be written as a sum of positive squares in 2 ways, for example, as 35407196224 + 10042845796 = 188168^2 + 100214^2 .

It is not an unprimeable number, because it can be changed into a prime (45450042023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136251031 + ... + 1136251070.

It is an arithmetic number, because the mean of its divisors is an integer number (7953757357).

Almost surely, 2^45450042020 is an apocalyptic number.

It is an amenable number.

45450042020 is an abundant number, since it is smaller than the sum of its proper divisors (49995046264).

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

45450042020 is a wasteful number, since it uses less digits than its factorization.

45450042020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272502110 (or 2272502108 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

Adding to 45450042020 its reverse (2024005454), we get a palindrome (47474047474).

The spelling of 45450042020 in words is "forty-five billion, four hundred fifty million, forty-two thousand, twenty".