19445893451 has 2 divisors, whose sum is σ = 19445893452. Its totient is φ = 19445893450.

The previous prime is 19445893399. The next prime is 19445893477. The reversal of 19445893451 is 15439854491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19445893451 - 2¹⁸ = 19445631307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19445893393 and 19445893402.

It is not a weakly prime, because it can be changed into another prime (19445893151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9722946725 + 9722946726.

It is an arithmetic number, because the mean of its divisors is an integer number (9722946726).

Almost surely, 2^19445893451 is an apocalyptic number.

19445893451 is a deficient number, since it is larger than the sum of its proper divisors (1).

19445893451 is an equidigital number, since it uses as much as digits as its factorization.

19445893451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 53.

The spelling of 19445893451 in words is "nineteen billion, four hundred forty-five million, eight hundred ninety-three thousand, four hundred fifty-one".