20686622275 has 12 divisors (see below), whose sum is σ = 27983358504. Its totient is φ = 15044816000.

The previous prime is 20686622249. The next prime is 20686622309. The reversal of 20686622275 is 57222668602.

It is a happy number.

It is not a de Polignac number, because 20686622275 - 2³¹ = 18539138627 is a prime.

It is a super-2 number, since 2×20686622275² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37611766 + ... + 37612315.

It is an arithmetic number, because the mean of its divisors is an integer number (2331946542).

Almost surely, 2^20686622275 is an apocalyptic number.

20686622275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20686622275 is a deficient number, since it is larger than the sum of its proper divisors (7296736229).

20686622275 is a wasteful number, since it uses less digits than its factorization.

20686622275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75224102 (or 75224097 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 20686622275 in words is "twenty billion, six hundred eighty-six million, six hundred twenty-two thousand, two hundred seventy-five".