21202093919 has 2 divisors, whose sum is σ = 21202093920. Its totient is φ = 21202093918.

The previous prime is 21202093897. The next prime is 21202093951. The reversal of 21202093919 is 91939020212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202093919 - 2⁸ = 21202093663 is a prime.

It is a super-2 number, since 2×21202093919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202093999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601046959 + 10601046960.

It is an arithmetic number, because the mean of its divisors is an integer number (10601046960).

Almost surely, 2^21202093919 is an apocalyptic number.

21202093919 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202093919 is an equidigital number, since it uses as much as digits as its factorization.

21202093919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 21202093919 in words is "twenty-one billion, two hundred two million, ninety-three thousand, nine hundred nineteen".