20257001357705 has 32 divisors (see below), whose sum is σ = 29320349107200. Its totient is φ = 13124713839552.

The previous prime is 20257001357699. The next prime is 20257001357807. The reversal of 20257001357705 is 50775310075202.

It is not a de Polignac number, because 20257001357705 - 2¹⁴ = 20257001341321 is a prime.

It is a super-2 number, since 2×20257001357705² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39934847 + ... + 40438916.

It is an arithmetic number, because the mean of its divisors is an integer number (916260909600).

Almost surely, 2^{20257001357705} is an apocalyptic number.

It is an amenable number.

20257001357705 is a deficient number, since it is larger than the sum of its proper divisors (9063347749495).

20257001357705 is a wasteful number, since it uses less digits than its factorization.

20257001357705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80374173.

The product of its (nonzero) digits is 514500, while the sum is 44.

The spelling of 20257001357705 in words is "twenty trillion, two hundred fifty-seven billion, one million, three hundred fifty-seven thousand, seven hundred five".