20423251314355 has 16 divisors (see below), whose sum is σ = 24518276582400. Its totient is φ = 16331685027840.

The previous prime is 20423251314343. The next prime is 20423251314383. The reversal of 20423251314355 is 55341315232402.

It is a de Polignac number, because none of the positive numbers 2^k-20423251314355 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490439335 + ... + 490480975.

It is an arithmetic number, because the mean of its divisors is an integer number (1532392286400).

Almost surely, 2^{20423251314355} is an apocalyptic number.

20423251314355 is a deficient number, since it is larger than the sum of its proper divisors (4095025268045).

20423251314355 is a wasteful number, since it uses less digits than its factorization.

20423251314355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80814.

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 20423251314355 its reverse (55341315232402), we get a palindrome (75764566546757).

The spelling of 20423251314355 in words is "twenty trillion, four hundred twenty-three billion, two hundred fifty-one million, three hundred fourteen thousand, three hundred fifty-five".