30520127897 has 18 divisors (see below), whose sum is σ = 37597629438. Its totient is φ = 24617212032.

The previous prime is 30520127831. The next prime is 30520127933. The reversal of 30520127897 is 79872102503.

It can be written as a sum of positive squares in 3 ways, for example, as 24840256 + 30495287641 = 4984^2 + 174629^2 .

It is not a de Polignac number, because 30520127897 - 2¹⁴ = 30520111513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30520157897) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5039123 + ... + 5045175.

It is an arithmetic number, because the mean of its divisors is an integer number (2088757191).

Almost surely, 2^30520127897 is an apocalyptic number.

It is an amenable number.

30520127897 is a deficient number, since it is larger than the sum of its proper divisors (7077501541).

30520127897 is an frugal number, since it uses more digits than its factorization.

30520127897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12137 (or 6077 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 30520127897 in words is "thirty billion, five hundred twenty million, one hundred twenty-seven thousand, eight hundred ninety-seven".