20695902419 has 2 divisors, whose sum is σ = 20695902420. Its totient is φ = 20695902418.

The previous prime is 20695902379. The next prime is 20695902421. The reversal of 20695902419 is 91420959602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20695902419 - 2¹⁶ = 20695836883 is a prime.

It is a super-2 number, since 2×20695902419² (a number of 21 digits) contains 22 as substring.

Together with 20695902421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20695902439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10347951209 + 10347951210.

It is an arithmetic number, because the mean of its divisors is an integer number (10347951210).

Almost surely, 2^20695902419 is an apocalyptic number.

20695902419 is a deficient number, since it is larger than the sum of its proper divisors (1).

20695902419 is an equidigital number, since it uses as much as digits as its factorization.

20695902419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 20695902419 in words is "twenty billion, six hundred ninety-five million, nine hundred two thousand, four hundred nineteen".