20085178651 has 8 divisors (see below), whose sum is σ = 21123477504. Its totient is φ = 19060632360.

The previous prime is 20085178639. The next prime is 20085178657. The reversal of 20085178651 is 15687158002.

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

It is a cyclic number.

It is not a de Polignac number, because 20085178651 - 2¹³ = 20085170459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20085178598 and 20085178607.

It is not an unprimeable number, because it can be changed into a prime (20085178657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3435145 + ... + 3440986.

It is an arithmetic number, because the mean of its divisors is an integer number (2640434688).

Almost surely, 2^20085178651 is an apocalyptic number.

20085178651 is a deficient number, since it is larger than the sum of its proper divisors (1038298853).

20085178651 is a wasteful number, since it uses less digits than its factorization.

20085178651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876281.

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 20085178651 in words is "twenty billion, eighty-five million, one hundred seventy-eight thousand, six hundred fifty-one".