20154205344 has 192 divisors, whose sum is σ = 66702908160. Its totient is φ = 5185658880.

The previous prime is 20154205343. The next prime is 20154205363. The reversal of 20154205344 is 44350245102.

It is not an unprimeable number, because it can be changed into a prime (20154205343) 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, 330042 + ... + 386310.

It is an arithmetic number, because the mean of its divisors is an integer number (347410980).

Almost surely, 2^20154205344 is an apocalyptic number.

20154205344 is a gapful number since it is divisible by the number (24) 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 20154205344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33351454080).

20154205344 is an abundant number, since it is smaller than the sum of its proper divisors (46548702816).

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

20154205344 is a wasteful number, since it uses less digits than its factorization.

20154205344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56343 (or 56335 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 20154205344 in words is "twenty billion, one hundred fifty-four million, two hundred five thousand, three hundred forty-four".