40020023 has 16 divisors (see below), whose sum is σ = 46552320. Its totient is φ = 34125696.

The previous prime is 40020017. The next prime is 40020037. The reversal of 40020023 is 32002004.

It is a cyclic number.

It is not a de Polignac number, because 40020023 - 2⁸ = 40019767 is a prime.

It is a super-3 number, since 3×40020023³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40019986 and 40020013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4736 + ... + 10122.

It is an arithmetic number, because the mean of its divisors is an integer number (2909520).

Almost surely, 2^40020023 is an apocalyptic number.

40020023 is a deficient number, since it is larger than the sum of its proper divisors (6532297).

40020023 is a wasteful number, since it uses less digits than its factorization.

40020023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5446.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 40020023 is about 6326.1380794289. The cubic root of 40020023 is about 342.0522445636.

Adding to 40020023 its reverse (32002004), we get a palindrome (72022027).

The spelling of 40020023 in words is "forty million, twenty thousand, twenty-three".