23019140 has 12 divisors (see below), whose sum is σ = 48340236. Its totient is φ = 9207648.

The previous prime is 23019133. The next prime is 23019169. The reversal of 23019140 is 4191032.

It can be written as a sum of positive squares in 2 ways, for example, as 2534464 + 20484676 = 1592^2 + 4526^2 .

It is a super-3 number, since 3×23019140³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1150957 = 23019140 / (2 + 3 + 0 + 1 + 9 + 1 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575459 + ... + 575498.

It is an arithmetic number, because the mean of its divisors is an integer number (4028353).

Almost surely, 2^23019140 is an apocalyptic number.

23019140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23019140 is an abundant number, since it is smaller than the sum of its proper divisors (25321096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23019140 is a wasteful number, since it uses less digits than its factorization.

23019140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150966 (or 1150964 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 23019140 is about 4797.8265912807. The cubic root of 23019140 is about 284.4655625100.

The spelling of 23019140 in words is "twenty-three million, nineteen thousand, one hundred forty".