20858655371 has 2 divisors, whose sum is σ = 20858655372. Its totient is φ = 20858655370.

The previous prime is 20858655341. The next prime is 20858655437. The reversal of 20858655371 is 17355685802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20858655371 - 2³⁴ = 3678786187 is a prime.

It is a super-2 number, since 2×20858655371² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20858655341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10429327685 + 10429327686.

It is an arithmetic number, because the mean of its divisors is an integer number (10429327686).

Almost surely, 2^20858655371 is an apocalyptic number.

20858655371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858655371 is an equidigital number, since it uses as much as digits as its factorization.

20858655371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016000, while the sum is 50.

The spelling of 20858655371 in words is "twenty billion, eight hundred fifty-eight million, six hundred fifty-five thousand, three hundred seventy-one".