20557467085 has 8 divisors (see below), whose sum is σ = 24672476160. Its totient is φ = 16443629904.

The previous prime is 20557467067. The next prime is 20557467121. The reversal of 20557467085 is 58076475502.

It is a happy number.

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 20557467085 - 2¹³ = 20557458893 is a prime.

It is a super-3 number, since 3×20557467085³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253905 + ... + 324934.

It is an arithmetic number, because the mean of its divisors is an integer number (3084059520).

Almost surely, 2^20557467085 is an apocalyptic number.

It is an amenable number.

20557467085 is a deficient number, since it is larger than the sum of its proper divisors (4115009075).

20557467085 is an equidigital number, since it uses as much as digits as its factorization.

20557467085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585947.

The product of its (nonzero) digits is 2352000, while the sum is 49.

The spelling of 20557467085 in words is "twenty billion, five hundred fifty-seven million, four hundred sixty-seven thousand, eighty-five".