57540402020 has 12 divisors (see below), whose sum is σ = 120834844284. Its totient is φ = 23016160800.

The previous prime is 57540402013. The next prime is 57540402043. The reversal of 57540402020 is 2020404575.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14697197824 + 42843204196 = 121232^2 + 206986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438510031 + ... + 1438510070.

It is an arithmetic number, because the mean of its divisors is an integer number (10069570357).

Almost surely, 2^57540402020 is an apocalyptic number.

It is an amenable number.

57540402020 is an abundant number, since it is smaller than the sum of its proper divisors (63294442264).

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

57540402020 is a wasteful number, since it uses less digits than its factorization.

57540402020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877020110 (or 2877020108 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

Adding to 57540402020 its reverse (2020404575), we get a palindrome (59560806595).

The spelling of 57540402020 in words is "fifty-seven billion, five hundred forty million, four hundred two thousand, twenty".