19902130331 has 2 divisors, whose sum is σ = 19902130332. Its totient is φ = 19902130330.

The previous prime is 19902130271. The next prime is 19902130357. The reversal of 19902130331 is 13303120991.

It is a strong prime.

It is an emirp because it is prime and its reverse (13303120991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19902130331 - 2⁶ = 19902130267 is a prime.

It is a super-2 number, since 2×19902130331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19902130531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9951065165 + 9951065166.

It is an arithmetic number, because the mean of its divisors is an integer number (9951065166).

Almost surely, 2^19902130331 is an apocalyptic number.

19902130331 is a deficient number, since it is larger than the sum of its proper divisors (1).

19902130331 is an equidigital number, since it uses as much as digits as its factorization.

19902130331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The spelling of 19902130331 in words is "nineteen billion, nine hundred two million, one hundred thirty thousand, three hundred thirty-one".