5020621857 has 6 divisors (see below), whose sum is σ = 7252009362. Its totient is φ = 3347081232.

The previous prime is 5020621847. The next prime is 5020621873. The reversal of 5020621857 is 7581260205.

It is a happy number.

5020621857 is a `hidden beast` number, since 5 + 0 + 20 + 621 + 8 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4325561361 + 695060496 = 65769^2 + 26364^2 .

It is not a de Polignac number, because 5020621857 - 2⁴ = 5020621841 is a prime.

It is a super-2 number, since 2×5020621857² = 50413287661972256898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5020621817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278923428 + ... + 278923445.

It is an arithmetic number, because the mean of its divisors is an integer number (1208668227).

Almost surely, 2^5020621857 is an apocalyptic number.

It is an amenable number.

5020621857 is a deficient number, since it is larger than the sum of its proper divisors (2231387505).

5020621857 is a wasteful number, since it uses less digits than its factorization.

5020621857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557846879 (or 557846876 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 5020621857 is about 70856.3466247026. The cubic root of 5020621857 is about 1712.3235807535.

The spelling of 5020621857 in words is "five billion, twenty million, six hundred twenty-one thousand, eight hundred fifty-seven".