30820012057 has 2 divisors, whose sum is σ = 30820012058. Its totient is φ = 30820012056.

The previous prime is 30820012049. The next prime is 30820012103. The reversal of 30820012057 is 75021002803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30791826576 + 28185481 = 175476^2 + 5309^2 .

It is a cyclic number.

It is not a de Polignac number, because 30820012057 - 2³ = 30820012049 is a prime.

It is not a weakly prime, because it can be changed into another prime (30820012007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15410006028 + 15410006029.

It is an arithmetic number, because the mean of its divisors is an integer number (15410006029).

Almost surely, 2^30820012057 is an apocalyptic number.

It is an amenable number.

30820012057 is a deficient number, since it is larger than the sum of its proper divisors (1).

30820012057 is an equidigital number, since it uses as much as digits as its factorization.

30820012057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 30820012057 in words is "thirty billion, eight hundred twenty million, twelve thousand, fifty-seven".