19473861401 has 2 divisors, whose sum is σ = 19473861402. Its totient is φ = 19473861400.

The previous prime is 19473861367. The next prime is 19473861479. The reversal of 19473861401 is 10416837491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19467225625 + 6635776 = 139525^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 19473861401 - 2²² = 19469667097 is a prime.

It is not a weakly prime, because it can be changed into another prime (19473861101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9736930700 + 9736930701.

It is an arithmetic number, because the mean of its divisors is an integer number (9736930701).

Almost surely, 2^19473861401 is an apocalyptic number.

It is an amenable number.

19473861401 is a deficient number, since it is larger than the sum of its proper divisors (1).

19473861401 is an equidigital number, since it uses as much as digits as its factorization.

19473861401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 19473861401 in words is "nineteen billion, four hundred seventy-three million, eight hundred sixty-one thousand, four hundred one".