20013555319 has 2 divisors, whose sum is σ = 20013555320. Its totient is φ = 20013555318.

The previous prime is 20013555301. The next prime is 20013555347. The reversal of 20013555319 is 91355531002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20013555319 - 2⁹ = 20013554807 is a prime.

It is a super-2 number, since 2×20013555319² (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 (20013555379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006777659 + 10006777660.

It is an arithmetic number, because the mean of its divisors is an integer number (10006777660).

Almost surely, 2^20013555319 is an apocalyptic number.

20013555319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013555319 is an equidigital number, since it uses as much as digits as its factorization.

20013555319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 34.

The spelling of 20013555319 in words is "twenty billion, thirteen million, five hundred fifty-five thousand, three hundred nineteen".