20859619026455 has 16 divisors (see below), whose sum is σ = 27410967074304. Its totient is φ = 15112948997280.

The previous prime is 20859619026443. The next prime is 20859619026469. The reversal of 20859619026455 is 55462091695802.

It is not a de Polignac number, because 20859619026455 - 2⁴ = 20859619026439 is a prime.

It is a congruent number.

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, 721023179 + ... + 721052108.

It is an arithmetic number, because the mean of its divisors is an integer number (1713185442144).

Almost surely, 2^{20859619026455} is an apocalyptic number.

20859619026455 is a deficient number, since it is larger than the sum of its proper divisors (6551348047849).

20859619026455 is a wasteful number, since it uses less digits than its factorization.

20859619026455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442075566.

The product of its (nonzero) digits is 46656000, while the sum is 62.

The spelling of 20859619026455 in words is "twenty trillion, eight hundred fifty-nine billion, six hundred nineteen million, twenty-six thousand, four hundred fifty-five".