20267536019 has 2 divisors, whose sum is σ = 20267536020. Its totient is φ = 20267536018.

The previous prime is 20267536001. The next prime is 20267536039. The reversal of 20267536019 is 91063576202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20267536019 is a prime.

It is a super-2 number, since 2×20267536019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20267536039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10133768009 + 10133768010.

It is an arithmetic number, because the mean of its divisors is an integer number (10133768010).

Almost surely, 2^20267536019 is an apocalyptic number.

20267536019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20267536019 is an equidigital number, since it uses as much as digits as its factorization.

20267536019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 20267536019 in words is "twenty billion, two hundred sixty-seven million, five hundred thirty-six thousand, nineteen".