23019988 has 6 divisors (see below), whose sum is σ = 40284986. Its totient is φ = 11509992.

The previous prime is 23019979. The next prime is 23020009. The reversal of 23019988 is 88991032.

It can be written as a sum of positive squares in only one way, i.e., 22771984 + 248004 = 4772^2 + 498^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23019988.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2877495 + ... + 2877502.

Almost surely, 2^23019988 is an apocalyptic number.

It is an amenable number.

23019988 is a deficient number, since it is larger than the sum of its proper divisors (17264998).

23019988 is a wasteful number, since it uses less digits than its factorization.

23019988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5755001 (or 5754999 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 23019988 is about 4797.9149638150. The cubic root of 23019988 is about 284.4690556007.

The spelling of 23019988 in words is "twenty-three million, nineteen thousand, nine hundred eighty-eight".