20246915377 has 12 divisors (see below), whose sum is σ = 22015190604. Its totient is φ = 18611873280.

The previous prime is 20246915327. The next prime is 20246915383. The reversal of 20246915377 is 77351964202.

It can be written as a sum of positive squares in 6 ways, for example, as 3023240256 + 17223675121 = 54984^2 + 131239^2 .

It is not a de Polignac number, because 20246915377 - 2¹¹ = 20246913329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20246915317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207828 + ... + 289285.

It is an arithmetic number, because the mean of its divisors is an integer number (1834599217).

Almost surely, 2^20246915377 is an apocalyptic number.

It is an amenable number.

20246915377 is a deficient number, since it is larger than the sum of its proper divisors (1768275227).

20246915377 is a wasteful number, since it uses less digits than its factorization.

20246915377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497380 (or 497367 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 20246915377 in words is "twenty billion, two hundred forty-six million, nine hundred fifteen thousand, three hundred seventy-seven".