19037200375421 has 2 divisors, whose sum is σ = 19037200375422. Its totient is φ = 19037200375420.

The previous prime is 19037200375397. The next prime is 19037200375423. The reversal of 19037200375421 is 12457300273091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19019071099396 + 18129276025 = 4361086^2 + 134645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19037200375421 is a prime.

Together with 19037200375423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19037200375423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9518600187710 + 9518600187711.

It is an arithmetic number, because the mean of its divisors is an integer number (9518600187711).

Almost surely, 2^{19037200375421} is an apocalyptic number.

It is an amenable number.

19037200375421 is a deficient number, since it is larger than the sum of its proper divisors (1).

19037200375421 is an equidigital number, since it uses as much as digits as its factorization.

19037200375421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 19037200375421 in words is "nineteen trillion, thirty-seven billion, two hundred million, three hundred seventy-five thousand, four hundred twenty-one".