20813762557 has 16 divisors (see below), whose sum is σ = 24235356672. Its totient is φ = 17507347200.

The previous prime is 20813762539. The next prime is 20813762573. The reversal of 20813762557 is 75526731802.

It is not a de Polignac number, because 20813762557 - 2¹¹ = 20813760509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20813762587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50373 + ... + 210154.

It is an arithmetic number, because the mean of its divisors is an integer number (1514709792).

Almost surely, 2^20813762557 is an apocalyptic number.

It is an amenable number.

20813762557 is a deficient number, since it is larger than the sum of its proper divisors (3421594115).

20813762557 is a wasteful number, since it uses less digits than its factorization.

20813762557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260748.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 20813762557 in words is "twenty billion, eight hundred thirteen million, seven hundred sixty-two thousand, five hundred fifty-seven".