20053851705 has 24 divisors (see below), whose sum is σ = 34763534208. Its totient is φ = 10694303136.

The previous prime is 20053851659. The next prime is 20053851707. The reversal of 20053851705 is 50715835002.

20053851705 is a `hidden beast` number, since 2 + 0 + 0 + 538 + 51 + 70 + 5 = 666.

It is not a de Polignac number, because 20053851705 - 2⁷ = 20053851577 is a prime.

It is a super-2 number, since 2×20053851705² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20053851705.

It is not an unprimeable number, because it can be changed into a prime (20053851707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 639114 + ... + 669756.

It is an arithmetic number, because the mean of its divisors is an integer number (1448480592).

Almost surely, 2^20053851705 is an apocalyptic number.

It is an amenable number.

20053851705 is a deficient number, since it is larger than the sum of its proper divisors (14709682503).

20053851705 is a wasteful number, since it uses less digits than its factorization.

20053851705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45197 (or 45194 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 20053851705 in words is "twenty billion, fifty-three million, eight hundred fifty-one thousand, seven hundred five".