20401022111420 has 24 divisors (see below), whose sum is σ = 42842695414848. Its totient is φ = 8160304276800.

The previous prime is 20401022111389. The next prime is 20401022111423. The reversal of 20401022111420 is 2411122010402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20401022111392 and 20401022111401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401022111423) 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, 4926011 + ... + 8066450.

It is an arithmetic number, because the mean of its divisors is an integer number (1785112308952).

Almost surely, 2^{20401022111420} is an apocalyptic number.

20401022111420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20401022111420 is an abundant number, since it is smaller than the sum of its proper divisors (22441673303428).

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

20401022111420 is a wasteful number, since it uses less digits than its factorization.

20401022111420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13070981 (or 13070979 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20401022111420 its reverse (2411122010402), we get a palindrome (22812144121822).

The spelling of 20401022111420 in words is "twenty trillion, four hundred one billion, twenty-two million, one hundred eleven thousand, four hundred twenty".