20210100193919 has 2 divisors, whose sum is σ = 20210100193920. Its totient is φ = 20210100193918.

The previous prime is 20210100193909. The next prime is 20210100193937. The reversal of 20210100193919 is 91939100101202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210100193919 - 2³² = 20205805226623 is a prime.

It is a super-2 number, since 2×20210100193919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210100193909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105050096959 + 10105050096960.

It is an arithmetic number, because the mean of its divisors is an integer number (10105050096960).

Almost surely, 2^{20210100193919} is an apocalyptic number.

20210100193919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210100193919 is an equidigital number, since it uses as much as digits as its factorization.

20210100193919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 20210100193919 in words is "twenty trillion, two hundred ten billion, one hundred million, one hundred ninety-three thousand, nine hundred nineteen".