30820781471 has 16 divisors (see below), whose sum is σ = 32432894208. Its totient is φ = 29231716800.

The previous prime is 30820781449. The next prime is 30820781473. The reversal of 30820781471 is 17418702803.

It is a cyclic number.

It is not a de Polignac number, because 30820781471 - 2¹⁰ = 30820780447 is a prime.

It is a super-3 number, since 3×30820781471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30820781473) 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, 4458800 + ... + 4465706.

It is an arithmetic number, because the mean of its divisors is an integer number (2027055888).

Almost surely, 2^30820781471 is an apocalyptic number.

30820781471 is a deficient number, since it is larger than the sum of its proper divisors (1612112737).

30820781471 is a wasteful number, since it uses less digits than its factorization.

30820781471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542.

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 30820781471 in words is "thirty billion, eight hundred twenty million, seven hundred eighty-one thousand, four hundred seventy-one".