20057641745 has 16 divisors (see below), whose sum is σ = 25875037440. Its totient is φ = 14878139904.

The previous prime is 20057641733. The next prime is 20057641757. The reversal of 20057641745 is 54714675002.

It is an interprime number because it is at equal distance from previous prime (20057641733) and next prime (20057641757).

It is a cyclic number.

It is not a de Polignac number, because 20057641745 - 2¹⁰ = 20057640721 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, 2241632 + ... + 2250561.

It is an arithmetic number, because the mean of its divisors is an integer number (1617189840).

Almost surely, 2^20057641745 is an apocalyptic number.

It is an amenable number.

20057641745 is a deficient number, since it is larger than the sum of its proper divisors (5817395695).

20057641745 is a wasteful number, since it uses less digits than its factorization.

20057641745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492264.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 20057641745 in words is "twenty billion, fifty-seven million, six hundred forty-one thousand, seven hundred forty-five".