20340143220 has 48 divisors (see below), whose sum is σ = 56963789568. Its totient is φ = 5422953600.

The previous prime is 20340143191. The next prime is 20340143287. The reversal of 20340143220 is 2234104302.

It is a super-2 number, since 2×20340143220² (a number of 21 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 15 ways as a sum of consecutive naturals, for example, 295045 + ... + 357395.

It is an arithmetic number, because the mean of its divisors is an integer number (1186745616).

Almost surely, 2^20340143220 is an apocalyptic number.

20340143220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20340143220 is an abundant number, since it is smaller than the sum of its proper divisors (36623646348).

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

20340143220 is a wasteful number, since it uses less digits than its factorization.

20340143220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67800 (or 67798 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20340143220 its reverse (2234104302), we get a palindrome (22574247522).

The spelling of 20340143220 in words is "twenty billion, three hundred forty million, one hundred forty-three thousand, two hundred twenty".