23012020434 has 64 divisors (see below), whose sum is σ = 51347116800. Its totient is φ = 6826643712.

The previous prime is 23012020433. The next prime is 23012020441. The reversal of 23012020434 is 43402021032.

It is a self number, because there is not a number n which added to its sum of digits gives 23012020434.

It is not an unprimeable number, because it can be changed into a prime (23012020433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1651107 + ... + 1664985.

It is an arithmetic number, because the mean of its divisors is an integer number (802298700).

Almost surely, 2^23012020434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23012020434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25673558400).

23012020434 is an abundant number, since it is smaller than the sum of its proper divisors (28335096366).

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

23012020434 is a wasteful number, since it uses less digits than its factorization.

23012020434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14659.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 23012020434 its reverse (43402021032), we get a palindrome (66414041466).

The spelling of 23012020434 in words is "twenty-three billion, twelve million, twenty thousand, four hundred thirty-four".