20137778325611 has 32 divisors (see below), whose sum is σ = 22440702662400. Its totient is φ = 17989964334720.

The previous prime is 20137778325601. The next prime is 20137778325641. The reversal of 20137778325611 is 11652387773102.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20137778325611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20137778325601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297242201 + ... + 297309941.

It is an arithmetic number, because the mean of its divisors is an integer number (701271958200).

Almost surely, 2^{20137778325611} is an apocalyptic number.

20137778325611 is a deficient number, since it is larger than the sum of its proper divisors (2302924336789).

20137778325611 is a wasteful number, since it uses less digits than its factorization.

20137778325611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80379.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 20137778325611 in words is "twenty trillion, one hundred thirty-seven billion, seven hundred seventy-eight million, three hundred twenty-five thousand, six hundred eleven".