20311210220308 has 36 divisors (see below), whose sum is σ = 41812403097780. Its totient is φ = 8606997581952.

The previous prime is 20311210220263. The next prime is 20311210220449. The reversal of 20311210220308 is 80302201211302.

It can be written as a sum of positive squares in 2 ways, for example, as 8463281725584 + 11847928494724 = 2909172^2 + 3442082^2 .

It is a super-2 number, since 2×20311210220308² (a number of 27 digits) contains 22 as substring.

It is a congruent 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, 582165835 + ... + 582200722.

It is an arithmetic number, because the mean of its divisors is an integer number (1161455641605).

Almost surely, 2^{20311210220308} is an apocalyptic number.

20311210220308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20311210220308 is an abundant number, since it is smaller than the sum of its proper divisors (21501192877472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311210220308 is a wasteful number, since it uses less digits than its factorization.

20311210220308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164366664 (or 1164366655 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 20311210220308 in words is "twenty trillion, three hundred eleven billion, two hundred ten million, two hundred twenty thousand, three hundred eight".