20785344250377 has 32 divisors (see below), whose sum is σ = 32530693080064. Its totient is φ = 11555704036800.

The previous prime is 20785344250367. The next prime is 20785344250379. The reversal of 20785344250377 is 77305244358702.

It is a happy number.

It is not a de Polignac number, because 20785344250377 - 2¹⁰ = 20785344249353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20785344250379) 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, 13807302 + ... + 15238512.

It is an arithmetic number, because the mean of its divisors is an integer number (1016584158752).

Almost surely, 2^{20785344250377} is an apocalyptic number.

It is an amenable number.

20785344250377 is a deficient number, since it is larger than the sum of its proper divisors (11745348829687).

20785344250377 is a wasteful number, since it uses less digits than its factorization.

20785344250377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449949.

The product of its (nonzero) digits is 39513600, while the sum is 57.

The spelling of 20785344250377 in words is "twenty trillion, seven hundred eighty-five billion, three hundred forty-four million, two hundred fifty thousand, three hundred seventy-seven".