20202018656 has 12 divisors (see below), whose sum is σ = 39772724292. Its totient is φ = 10101009312.

The previous prime is 20202018649. The next prime is 20202018701. The reversal of 20202018656 is 65681020202.

It is a super-3 number, since 3×20202018656³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 631313083 = 20202018656 / (2 + 0 + 2 + 0 + 2 + 0 + 1 + 8 + 6 + 5 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315656510 + ... + 315656573.

It is an arithmetic number, because the mean of its divisors is an integer number (3314393691).

Almost surely, 2^20202018656 is an apocalyptic number.

It is an amenable number.

20202018656 is a deficient number, since it is larger than the sum of its proper divisors (19570705636).

20202018656 is an equidigital number, since it uses as much as digits as its factorization.

20202018656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631313093 (or 631313085 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 20202018656 its reverse (65681020202), we get a palindrome (85883038858).

The spelling of 20202018656 in words is "twenty billion, two hundred two million, eighteen thousand, six hundred fifty-six".