20022051420 has 240 divisors, whose sum is σ = 75561615360. Its totient is φ = 4335555456.

The previous prime is 20022051419. The next prime is 20022051449. The reversal of 20022051420 is 2415022002.

20022051420 is a `hidden beast` number, since 20 + 0 + 220 + 5 + 1 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20022051393 and 20022051402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 168997 + ... + 261923.

It is an arithmetic number, because the mean of its divisors is an integer number (314840064).

Almost surely, 2^20022051420 is an apocalyptic number.

20022051420 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 20022051420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37780807680).

20022051420 is an abundant number, since it is smaller than the sum of its proper divisors (55539563940).

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

20022051420 is a wasteful number, since it uses less digits than its factorization.

20022051420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92974 (or 92963 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 20022051420 its reverse (2415022002), we get a palindrome (22437073422).

The spelling of 20022051420 in words is "twenty billion, twenty-two million, fifty-one thousand, four hundred twenty".