20626656203 has 4 divisors (see below), whose sum is σ = 21337920240. Its totient is φ = 19915392168.

The previous prime is 20626656199. The next prime is 20626656263. The reversal of 20626656203 is 30265662602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20626656203 - 2² = 20626656199 is a prime.

It is a super-2 number, since 2×20626656203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20626656263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355631975 + ... + 355632032.

It is an arithmetic number, because the mean of its divisors is an integer number (5334480060).

Almost surely, 2^20626656203 is an apocalyptic number.

20626656203 is a deficient number, since it is larger than the sum of its proper divisors (711264037).

20626656203 is an equidigital number, since it uses as much as digits as its factorization.

20626656203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711264036.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 20626656203 in words is "twenty billion, six hundred twenty-six million, six hundred fifty-six thousand, two hundred three".