20110019873 has 2 divisors, whose sum is σ = 20110019874. Its totient is φ = 20110019872.

The previous prime is 20110019863. The next prime is 20110019911. The reversal of 20110019873 is 37891001102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18482946304 + 1627073569 = 135952^2 + 40337^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110019873 - 2¹⁸ = 20109757729 is a prime.

It is a super-2 number, since 2×20110019873² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20110019863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055009936 + 10055009937.

It is an arithmetic number, because the mean of its divisors is an integer number (10055009937).

Almost surely, 2^20110019873 is an apocalyptic number.

It is an amenable number.

20110019873 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110019873 is an equidigital number, since it uses as much as digits as its factorization.

20110019873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The spelling of 20110019873 in words is "twenty billion, one hundred ten million, nineteen thousand, eight hundred seventy-three".