20122553357 has 2 divisors, whose sum is σ = 20122553358. Its totient is φ = 20122553356.

The previous prime is 20122553333. The next prime is 20122553371. The reversal of 20122553357 is 75335522102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15598511236 + 4524042121 = 124894^2 + 67261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122553357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122553317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061276678 + 10061276679.

It is an arithmetic number, because the mean of its divisors is an integer number (10061276679).

Almost surely, 2^20122553357 is an apocalyptic number.

It is an amenable number.

20122553357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122553357 is an equidigital number, since it uses as much as digits as its factorization.

20122553357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 35.

The spelling of 20122553357 in words is "twenty billion, one hundred twenty-two million, five hundred fifty-three thousand, three hundred fifty-seven".