20154421122 has 32 divisors (see below), whose sum is σ = 44718600960. Its totient is φ = 6003883920.

The previous prime is 20154421109. The next prime is 20154421129. The reversal of 20154421122 is 22112445102.

It is a junction number, because it is equal to n+sod(n) for n = 20154421092 and 20154421101.

It is not an unprimeable number, because it can be changed into a prime (20154421129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2583988 + ... + 2591775.

It is an arithmetic number, because the mean of its divisors is an integer number (1397456280).

Almost surely, 2^20154421122 is an apocalyptic number.

20154421122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20154421122 is an abundant number, since it is smaller than the sum of its proper divisors (24564179838).

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

20154421122 is a wasteful number, since it uses less digits than its factorization.

20154421122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5175838.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 20154421122 its reverse (22112445102), we get a palindrome (42266866224).

The spelling of 20154421122 in words is "twenty billion, one hundred fifty-four million, four hundred twenty-one thousand, one hundred twenty-two".