20121202320 has 80 divisors (see below), whose sum is σ = 62416897920. Its totient is φ = 5362112512.

The previous prime is 20121202303. The next prime is 20121202379. The reversal of 20121202320 is 2320212102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20121202320.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347272 + ... + 401048.

It is an arithmetic number, because the mean of its divisors is an integer number (780211224).

Almost surely, 2^20121202320 is an apocalyptic number.

20121202320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121202320 is an abundant number, since it is smaller than the sum of its proper divisors (42295695600).

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

20121202320 is a wasteful number, since it uses less digits than its factorization.

20121202320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55352 (or 55346 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20121202320 its reverse (2320212102), we get a palindrome (22441414422).

The spelling of 20121202320 in words is "twenty billion, one hundred twenty-one million, two hundred two thousand, three hundred twenty".