19342621 has 2 divisors, whose sum is σ = 19342622. Its totient is φ = 19342620.

The previous prime is 19342613. The next prime is 19342639. The reversal of 19342621 is 12624391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19236996 + 105625 = 4386^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 19342621 - 2³ = 19342613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19342621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19342691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9671310 + 9671311.

It is an arithmetic number, because the mean of its divisors is an integer number (9671311).

Almost surely, 2^19342621 is an apocalyptic number.

It is an amenable number.

19342621 is a deficient number, since it is larger than the sum of its proper divisors (1).

19342621 is an equidigital number, since it uses as much as digits as its factorization.

19342621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 19342621 is about 4398.0246702355. The cubic root of 19342621 is about 268.4345672920.

The spelling of 19342621 in words is "nineteen million, three hundred forty-two thousand, six hundred twenty-one".