20085379775 has 12 divisors (see below), whose sum is σ = 24971597400. Its totient is φ = 16025899680.

The previous prime is 20085379771. The next prime is 20085379799. The reversal of 20085379775 is 57797358002.

It is not a de Polignac number, because 20085379775 - 2² = 20085379771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20085379771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1050440 + ... + 1069389.

It is an arithmetic number, because the mean of its divisors is an integer number (2080966450).

Almost surely, 2^20085379775 is an apocalyptic number.

20085379775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20085379775 is a deficient number, since it is larger than the sum of its proper divisors (4886217625).

20085379775 is a wasteful number, since it uses less digits than its factorization.

20085379775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120218 (or 2120213 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 53.

The spelling of 20085379775 in words is "twenty billion, eighty-five million, three hundred seventy-nine thousand, seven hundred seventy-five".