20154224442 has 128 divisors (see below), whose sum is σ = 46725009408. Its totient is φ = 5740358400.

The previous prime is 20154224417. The next prime is 20154224471. The reversal of 20154224442 is 24442245102.

It is a super-2 number, since 2×20154224442² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8135308 + ... + 8137784.

It is an arithmetic number, because the mean of its divisors is an integer number (365039136).

Almost surely, 2^20154224442 is an apocalyptic number.

20154224442 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 20154224442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23362504704).

20154224442 is an abundant number, since it is smaller than the sum of its proper divisors (26570784966).

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

20154224442 is a wasteful number, since it uses less digits than its factorization.

20154224442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644.

The product of its (nonzero) digits is 20480, while the sum is 30.

Adding to 20154224442 its reverse (24442245102), we get a palindrome (44596469544).

The spelling of 20154224442 in words is "twenty billion, one hundred fifty-four million, two hundred twenty-four thousand, four hundred forty-two".