20211013420 has 48 divisors (see below), whose sum is σ = 45792790848. Its totient is φ = 7448682240.

The previous prime is 20211013409. The next prime is 20211013463. The reversal of 20211013420 is 2431011202.

It is a junction number, because it is equal to n+sod(n) for n = 20211013394 and 20211013403.

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, 68817 + ... + 212503.

It is an arithmetic number, because the mean of its divisors is an integer number (954016476).

Almost surely, 2^20211013420 is an apocalyptic number.

20211013420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211013420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22896395424).

20211013420 is an abundant number, since it is smaller than the sum of its proper divisors (25581777428).

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

20211013420 is a wasteful number, since it uses less digits than its factorization.

20211013420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144250 (or 144248 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20211013420 its reverse (2431011202), we get a palindrome (22642024622).

The spelling of 20211013420 in words is "twenty billion, two hundred eleven million, thirteen thousand, four hundred twenty".