23156019 has 12 divisors (see below), whose sum is σ = 33525856. Its totient is φ = 15401232.

The previous prime is 23156017. The next prime is 23156047. The reversal of 23156019 is 91065132.

It is not a de Polignac number, because 23156019 - 2¹ = 23156017 is a prime.

It is a super-2 number, since 2×23156019² = 1072402431856722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23155983 and 23156001.

It is not an unprimeable number, because it can be changed into a prime (23156017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1389 + ... + 6945.

Almost surely, 2^23156019 is an apocalyptic number.

23156019 is a deficient number, since it is larger than the sum of its proper divisors (10369837).

23156019 is a wasteful number, since it uses less digits than its factorization.

23156019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6026 (or 6023 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 23156019 is about 4812.0701366460. The cubic root of 23156019 is about 285.0282889740.

The spelling of 23156019 in words is "twenty-three million, one hundred fifty-six thousand, nineteen".