20111202320 has 40 divisors (see below), whose sum is σ = 51009324480. Its totient is φ = 7313164160.

The previous prime is 20111202311. The next prime is 20111202329. The reversal of 20111202320 is 2320211102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20111202311) and next prime (20111202329).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 20111202295 and 20111202304.

It is not an unprimeable number, because it can be changed into a prime (20111202329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11425940 + ... + 11427699.

It is an arithmetic number, because the mean of its divisors is an integer number (1275233112).

Almost surely, 2^20111202320 is an apocalyptic number.

20111202320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111202320 is an abundant number, since it is smaller than the sum of its proper divisors (30898122160).

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

20111202320 is a wasteful number, since it uses less digits than its factorization.

20111202320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22853663 (or 22853657 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20111202320 its reverse (2320211102), we get a palindrome (22431413422).

The spelling of 20111202320 in words is "twenty billion, one hundred eleven million, two hundred two thousand, three hundred twenty".