20213123034 has 16 divisors (see below), whose sum is σ = 43535957472. Its totient is φ = 6219422448.

The previous prime is 20213123027. The next prime is 20213123057. The reversal of 20213123034 is 43032131202.

It is a self number, because there is not a number n which added to its sum of digits gives 20213123034.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129571224 + ... + 129571379.

It is an arithmetic number, because the mean of its divisors is an integer number (2720997342).

Almost surely, 2^20213123034 is an apocalyptic number.

20213123034 is an abundant number, since it is smaller than the sum of its proper divisors (23322834438).

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

20213123034 is a wasteful number, since it uses less digits than its factorization.

20213123034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259142621.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20213123034 its reverse (43032131202), we get a palindrome (63245254236).

The spelling of 20213123034 in words is "twenty billion, two hundred thirteen million, one hundred twenty-three thousand, thirty-four".