20123019 has 32 divisors (see below), whose sum is σ = 36080640. Its totient is φ = 10820736.

The previous prime is 20123017. The next prime is 20123021. The reversal of 20123019 is 91032102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20123017) and next prime (20123021).

It is not a de Polignac number, because 20123019 - 2¹ = 20123017 is a prime.

It is a super-2 number, since 2×20123019² = 809871787348722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20122992 and 20123010.

It is not an unprimeable number, because it can be changed into a prime (20123017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82 + ... + 6344.

It is an arithmetic number, because the mean of its divisors is an integer number (1127520).

Almost surely, 2^20123019 is an apocalyptic number.

20123019 is a deficient number, since it is larger than the sum of its proper divisors (15957621).

20123019 is a wasteful number, since it uses less digits than its factorization.

20123019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6296 (or 6290 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20123019 is about 4485.8688121701. The cubic root of 20123019 is about 271.9971660244.

It can be divided in two parts, 201 and 23019, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 20123019 in words is "twenty million, one hundred twenty-three thousand, nineteen".