20703169021 has 4 divisors (see below), whose sum is σ = 21184638112. Its totient is φ = 20221699932.

The previous prime is 20703168977. The next prime is 20703169031. The reversal of 20703169021 is 12096130702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20703169021 - 2³¹ = 18555685373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20703169031) 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, 240734481 + ... + 240734566.

It is an arithmetic number, because the mean of its divisors is an integer number (5296159528).

Almost surely, 2^20703169021 is an apocalyptic number.

It is an amenable number.

20703169021 is a deficient number, since it is larger than the sum of its proper divisors (481469091).

20703169021 is an equidigital number, since it uses as much as digits as its factorization.

20703169021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481469090.

The product of its (nonzero) digits is 4536, while the sum is 31.

Adding to 20703169021 its reverse (12096130702), we get a palindrome (32799299723).

The spelling of 20703169021 in words is "twenty billion, seven hundred three million, one hundred sixty-nine thousand, twenty-one".