20956690203 has 4 divisors (see below), whose sum is σ = 27942253608. Its totient is φ = 13971126800.

The previous prime is 20956690193. The next prime is 20956690219. The reversal of 20956690203 is 30209665902.

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 20956690203 - 2⁴ = 20956690187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20956610203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3492781698 + ... + 3492781703.

It is an arithmetic number, because the mean of its divisors is an integer number (6985563402).

Almost surely, 2^20956690203 is an apocalyptic number.

20956690203 is a deficient number, since it is larger than the sum of its proper divisors (6985563405).

20956690203 is an equidigital number, since it uses as much as digits as its factorization.

20956690203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6985563404.

The product of its (nonzero) digits is 174960, while the sum is 42.

The spelling of 20956690203 in words is "twenty billion, nine hundred fifty-six million, six hundred ninety thousand, two hundred three".