20618283955 has 16 divisors (see below), whose sum is σ = 25176227904. Its totient is φ = 16205719680.

The previous prime is 20618283949. The next prime is 20618284009. The reversal of 20618283955 is 55938281602.

It is a happy number.

It is not a de Polignac number, because 20618283955 - 2¹¹ = 20618281907 is a prime.

It is a super-2 number, since 2×20618283955² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20618283899 and 20618283908.

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, 232429 + ... + 308641.

It is an arithmetic number, because the mean of its divisors is an integer number (1573514244).

Almost surely, 2^20618283955 is an apocalyptic number.

20618283955 is a deficient number, since it is larger than the sum of its proper divisors (4557943949).

20618283955 is an equidigital number, since it uses as much as digits as its factorization.

20618283955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77166.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 20618283955 in words is "twenty billion, six hundred eighteen million, two hundred eighty-three thousand, nine hundred fifty-five".