20547678085 has 8 divisors (see below), whose sum is σ = 26898778656. Its totient is φ = 14943765840.

The previous prime is 20547678083. The next prime is 20547678091. The reversal of 20547678085 is 58087674502.

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

It is not a de Polignac number, because 20547678085 - 2¹ = 20547678083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547678083) 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, 186797019 + ... + 186797128.

It is an arithmetic number, because the mean of its divisors is an integer number (3362347332).

Almost surely, 2^20547678085 is an apocalyptic number.

It is an amenable number.

20547678085 is a deficient number, since it is larger than the sum of its proper divisors (6351100571).

20547678085 is a wasteful number, since it uses less digits than its factorization.

20547678085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373594163.

The product of its (nonzero) digits is 3763200, while the sum is 52.

The spelling of 20547678085 in words is "twenty billion, five hundred forty-seven million, six hundred seventy-eight thousand, eighty-five".