19622971 has 2 divisors, whose sum is σ = 19622972. Its totient is φ = 19622970.

The previous prime is 19622951. The next prime is 19622989. The reversal of 19622971 is 17922691.

It is a strong prime.

It is an emirp because it is prime and its reverse (17922691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19622971 - 2¹³ = 19614779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19622971.

It is not a weakly prime, because it can be changed into another prime (19622951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9811485 + 9811486.

It is an arithmetic number, because the mean of its divisors is an integer number (9811486).

Almost surely, 2^19622971 is an apocalyptic number.

19622971 is a deficient number, since it is larger than the sum of its proper divisors (1).

19622971 is an equidigital number, since it uses as much as digits as its factorization.

19622971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 19622971 is about 4429.7822745593. The cubic root of 19622971 is about 269.7252394656.

The spelling of 19622971 in words is "nineteen million, six hundred twenty-two thousand, nine hundred seventy-one".