20858234055423 has 32 divisors (see below), whose sum is σ = 28934002483200. Its totient is φ = 13349462103936.

The previous prime is 20858234055419. The next prime is 20858234055437. The reversal of 20858234055423 is 32455043285802.

It is not a de Polignac number, because 20858234055423 - 2² = 20858234055419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858234055493) 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, 145426861 + ... + 145570217.

It is an arithmetic number, because the mean of its divisors is an integer number (904187577600).

Almost surely, 2^{20858234055423} is an apocalyptic number.

20858234055423 is a deficient number, since it is larger than the sum of its proper divisors (8075768427777).

20858234055423 is a wasteful number, since it uses less digits than its factorization.

20858234055423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152911.

The product of its (nonzero) digits is 9216000, while the sum is 51.

The spelling of 20858234055423 in words is "twenty trillion, eight hundred fifty-eight billion, two hundred thirty-four million, fifty-five thousand, four hundred twenty-three".