4953218821 has 16 divisors (see below), whose sum is σ = 5468221440. Its totient is φ = 4465601280.

The previous prime is 4953218807. The next prime is 4953218863. The reversal of 4953218821 is 1288123594.

It is a cyclic number.

It is not a de Polignac number, because 4953218821 - 2¹³ = 4953210629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4953218801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23056 + ... + 102166.

It is an arithmetic number, because the mean of its divisors is an integer number (341763840).

Almost surely, 2^4953218821 is an apocalyptic number.

It is an amenable number.

4953218821 is a deficient number, since it is larger than the sum of its proper divisors (515002619).

4953218821 is a wasteful number, since it uses less digits than its factorization.

4953218821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79284.

The product of its digits is 138240, while the sum is 43.

The square root of 4953218821 is about 70379.1078445869. The cubic root of 4953218821 is about 1704.6262480870.

The spelling of 4953218821 in words is "four billion, nine hundred fifty-three million, two hundred eighteen thousand, eight hundred twenty-one".