20860307091 has 48 divisors (see below), whose sum is σ = 32652075456. Its totient is φ = 12757195008.

The previous prime is 20860307051. The next prime is 20860307101. The reversal of 20860307091 is 19070306802.

20860307091 is a `hidden beast` number, since 208 + 60 + 307 + 0 + 91 = 666.

It is not a de Polignac number, because 20860307091 - 2⁷ = 20860306963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20860307021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23785545 + ... + 23786421.

It is an arithmetic number, because the mean of its divisors is an integer number (680251572).

Almost surely, 2^20860307091 is an apocalyptic number.

20860307091 is a deficient number, since it is larger than the sum of its proper divisors (11791768365).

20860307091 is a wasteful number, since it uses less digits than its factorization.

20860307091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932 (or 1929 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 20860307091 in words is "twenty billion, eight hundred sixty million, three hundred seven thousand, ninety-one".