20154434034 has 64 divisors (see below), whose sum is σ = 48613570560. Its totient is φ = 5441644800.

The previous prime is 20154433991. The next prime is 20154434039. The reversal of 20154434034 is 43043445102.

It is a super-2 number, since 2×20154434034² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20154433992 and 20154434010.

It is not an unprimeable number, because it can be changed into a prime (20154434039) 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, 288507 + ... + 351489.

It is an arithmetic number, because the mean of its divisors is an integer number (759587040).

Almost surely, 2^20154434034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20154434034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24306785280).

20154434034 is an abundant number, since it is smaller than the sum of its proper divisors (28459136526).

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

20154434034 is a wasteful number, since it uses less digits than its factorization.

20154434034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63415.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 20154434034 its reverse (43043445102), we get a palindrome (63197879136).

The spelling of 20154434034 in words is "twenty billion, one hundred fifty-four million, four hundred thirty-four thousand, thirty-four".