20423214341220 has 48 divisors (see below), whose sum is σ = 57185226540288. Its totient is φ = 5446168930560.

The previous prime is 20423214341209. The next prime is 20423214341291. The reversal of 20423214341220 is 2214341232402.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 19700277 + ... + 20711043.

It is an arithmetic number, because the mean of its divisors is an integer number (1191358886256).

Almost surely, 2^{20423214341220} is an apocalyptic number.

20423214341220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423214341220 is an abundant number, since it is smaller than the sum of its proper divisors (36762012199068).

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

20423214341220 is a wasteful number, since it uses less digits than its factorization.

20423214341220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347540 (or 1347538 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 20423214341220 its reverse (2214341232402), we get a palindrome (22637555573622).

The spelling of 20423214341220 in words is "twenty trillion, four hundred twenty-three billion, two hundred fourteen million, three hundred forty-one thousand, two hundred twenty".