20085379778 has 8 divisors (see below), whose sum is σ = 30259633980. Its totient is φ = 9998835120.

The previous prime is 20085379771. The next prime is 20085379799. The reversal of 20085379778 is 87797358002.

It can be written as a sum of positive squares in 2 ways, for example, as 13052377009 + 7033002769 = 114247^2 + 83863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 21926813 + ... + 21927728.

Almost surely, 2^20085379778 is an apocalyptic number.

20085379778 is a deficient number, since it is larger than the sum of its proper divisors (10174254202).

20085379778 is a wasteful number, since it uses less digits than its factorization.

20085379778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43854772.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 20085379778 in words is "twenty billion, eighty-five million, three hundred seventy-nine thousand, seven hundred seventy-eight".