40220023 has 4 divisors (see below), whose sum is σ = 40238128. Its totient is φ = 40201920.

The previous prime is 40220021. The next prime is 40220027. The reversal of 40220023 is 32002204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40220023 - 2¹ = 40220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40219985 and 40220012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40220021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5163 + ... + 10348.

It is an arithmetic number, because the mean of its divisors is an integer number (10059532).

Almost surely, 2^40220023 is an apocalyptic number.

40220023 is a deficient number, since it is larger than the sum of its proper divisors (18105).

40220023 is a wasteful number, since it uses less digits than its factorization.

40220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18104.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 40220023 is about 6341.9258116127. The cubic root of 40220023 is about 342.6210998413.

Adding to 40220023 its reverse (32002204), we get a palindrome (72222227).

The spelling of 40220023 in words is "forty million, two hundred twenty thousand, twenty-three".