20434255123 has 8 divisors (see below), whose sum is σ = 21142774800. Its totient is φ = 19725994848.

The previous prime is 20434255111. The next prime is 20434255141. The reversal of 20434255123 is 32155243402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20434255123 - 2⁵ = 20434255091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434255183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102813 + ... + 226801.

It is an arithmetic number, because the mean of its divisors is an integer number (2642846850).

Almost surely, 2^20434255123 is an apocalyptic number.

20434255123 is a deficient number, since it is larger than the sum of its proper divisors (708519677).

20434255123 is a wasteful number, since it uses less digits than its factorization.

20434255123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129701.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20434255123 its reverse (32155243402), we get a palindrome (52589498525).

The spelling of 20434255123 in words is "twenty billion, four hundred thirty-four million, two hundred fifty-five thousand, one hundred twenty-three".