20120420562 has 64 divisors (see below), whose sum is σ = 45853516800. Its totient is φ = 5826180800.

The previous prime is 20120420521. The next prime is 20120420563. The reversal of 20120420562 is 26502402102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20120420563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1650064 + ... + 1662212.

It is an arithmetic number, because the mean of its divisors is an integer number (716461200).

Almost surely, 2^20120420562 is an apocalyptic number.

20120420562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120420562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22926758400).

20120420562 is an abundant number, since it is smaller than the sum of its proper divisors (25733096238).

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

20120420562 is a wasteful number, since it uses less digits than its factorization.

20120420562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13279.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20120420562 its reverse (26502402102), we get a palindrome (46622822664).

The spelling of 20120420562 in words is "twenty billion, one hundred twenty million, four hundred twenty thousand, five hundred sixty-two".