19020709157 has 2 divisors, whose sum is σ = 19020709158. Its totient is φ = 19020709156.

The previous prime is 19020709087. The next prime is 19020709163. The reversal of 19020709157 is 75190702091.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18205835041 + 814874116 = 134929^2 + 28546^2 .

It is a cyclic number.

It is not a de Polignac number, because 19020709157 - 2²⁴ = 19003931941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19020709187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9510354578 + 9510354579.

It is an arithmetic number, because the mean of its divisors is an integer number (9510354579).

Almost surely, 2^19020709157 is an apocalyptic number.

It is an amenable number.

19020709157 is a deficient number, since it is larger than the sum of its proper divisors (1).

19020709157 is an equidigital number, since it uses as much as digits as its factorization.

19020709157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 41.

The spelling of 19020709157 in words is "nineteen billion, twenty million, seven hundred nine thousand, one hundred fifty-seven".