20806681467 has 32 divisors (see below), whose sum is σ = 32642184960. Its totient is φ = 11622280320.

The previous prime is 20806681451. The next prime is 20806681499. The reversal of 20806681467 is 76418660802.

It is not a de Polignac number, because 20806681467 - 2⁴ = 20806681451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20806681267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245913 + ... + 319509.

It is an arithmetic number, because the mean of its divisors is an integer number (1020068280).

Almost surely, 2^20806681467 is an apocalyptic number.

20806681467 is a deficient number, since it is larger than the sum of its proper divisors (11835503493).

20806681467 is a wasteful number, since it uses less digits than its factorization.

20806681467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74283.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 20806681467 in words is "twenty billion, eight hundred six million, six hundred eighty-one thousand, four hundred sixty-seven".