20120347929811 has 2 divisors, whose sum is σ = 20120347929812. Its totient is φ = 20120347929810.

The previous prime is 20120347929797. The next prime is 20120347929883. The reversal of 20120347929811 is 11892974302102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20120347929811 - 2⁹ = 20120347929299 is a prime.

It is not a weakly prime, because it can be changed into another prime (20120347920811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060173964905 + 10060173964906.

It is an arithmetic number, because the mean of its divisors is an integer number (10060173964906).

Almost surely, 2^{20120347929811} is an apocalyptic number.

20120347929811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120347929811 is an equidigital number, since it uses as much as digits as its factorization.

20120347929811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 20120347929811 in words is "twenty trillion, one hundred twenty billion, three hundred forty-seven million, nine hundred twenty-nine thousand, eight hundred eleven".