20323400034 has 96 divisors (see below), whose sum is σ = 49478579136. Its totient is φ = 5542992000.

The previous prime is 20323400011. The next prime is 20323400051. The reversal of 20323400034 is 43000432302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 558909 + ... + 594159.

It is an arithmetic number, because the mean of its divisors is an integer number (515401866).

Almost surely, 2^20323400034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20323400034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24739289568).

20323400034 is an abundant number, since it is smaller than the sum of its proper divisors (29155179102).

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

20323400034 is a wasteful number, since it uses less digits than its factorization.

20323400034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35360 (or 35353 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

Adding to 20323400034 its reverse (43000432302), we get a palindrome (63323832336).

The spelling of 20323400034 in words is "twenty billion, three hundred twenty-three million, four hundred thousand, thirty-four".