20955013357 has 2 divisors, whose sum is σ = 20955013358. Its totient is φ = 20955013356.

The previous prime is 20955013337. The next prime is 20955013423. The reversal of 20955013357 is 75331055902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19093436041 + 1861577316 = 138179^2 + 43146^2 .

It is a cyclic number.

It is not a de Polignac number, because 20955013357 - 2¹⁹ = 20954489069 is a prime.

It is a super-2 number, since 2×20955013357² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20955013337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477506678 + 10477506679.

It is an arithmetic number, because the mean of its divisors is an integer number (10477506679).

Almost surely, 2^20955013357 is an apocalyptic number.

It is an amenable number.

20955013357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20955013357 is an equidigital number, since it uses as much as digits as its factorization.

20955013357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141750, while the sum is 40.

The spelling of 20955013357 in words is "twenty billion, nine hundred fifty-five million, thirteen thousand, three hundred fifty-seven".