20203119997 has 2 divisors, whose sum is σ = 20203119998. Its totient is φ = 20203119996.

The previous prime is 20203119977. The next prime is 20203120009. The reversal of 20203119997 is 79991130202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10881410596 + 9321709401 = 104314^2 + 96549^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203119997 - 2⁷ = 20203119869 is a prime.

It is a super-2 number, since 2×20203119997² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203119967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101559998 + 10101559999.

It is an arithmetic number, because the mean of its divisors is an integer number (10101559999).

Almost surely, 2^20203119997 is an apocalyptic number.

It is an amenable number.

20203119997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203119997 is an equidigital number, since it uses as much as digits as its factorization.

20203119997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The spelling of 20203119997 in words is "twenty billion, two hundred three million, one hundred nineteen thousand, nine hundred ninety-seven".