20199622427 has 2 divisors, whose sum is σ = 20199622428. Its totient is φ = 20199622426.

The previous prime is 20199622409. The next prime is 20199622439. The reversal of 20199622427 is 72422699102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20199622427 is a prime.

It is a super-2 number, since 2×20199622427² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20199622127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10099811213 + 10099811214.

It is an arithmetic number, because the mean of its divisors is an integer number (10099811214).

Almost surely, 2^20199622427 is an apocalyptic number.

20199622427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20199622427 is an equidigital number, since it uses as much as digits as its factorization.

20199622427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 20199622427 in words is "twenty billion, one hundred ninety-nine million, six hundred twenty-two thousand, four hundred twenty-seven".