20850708177 has 16 divisors (see below), whose sum is σ = 33266087680. Its totient is φ = 12831204816.

The previous prime is 20850708163. The next prime is 20850708181. The reversal of 20850708177 is 77180705802.

It is not a de Polignac number, because 20850708177 - 2¹⁵ = 20850675409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20850708157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29701513 + ... + 29702214.

It is an arithmetic number, because the mean of its divisors is an integer number (2079130480).

Almost surely, 2^20850708177 is an apocalyptic number.

20850708177 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20850708177 is a deficient number, since it is larger than the sum of its proper divisors (12415379503).

20850708177 is a wasteful number, since it uses less digits than its factorization.

20850708177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59403749 (or 59403743 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 45.

The spelling of 20850708177 in words is "twenty billion, eight hundred fifty million, seven hundred eight thousand, one hundred seventy-seven".