16402023 has 36 divisors (see below), whose sum is σ = 26903448. Its totient is φ = 9549120.

The previous prime is 16402019. The next prime is 16402027. The reversal of 16402023 is 32020461.

It is a happy number.

16402023 is a `hidden beast` number, since 1 + 640 + 2 + 0 + 23 = 666.

It is an interprime number because it is at equal distance from previous prime (16402019) and next prime (16402027).

It is not a de Polignac number, because 16402023 - 2² = 16402019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16401987 and 16402005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16402027) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 83161 + ... + 83357.

It is an arithmetic number, because the mean of its divisors is an integer number (747318).

Almost surely, 2^16402023 is an apocalyptic number.

16402023 is a deficient number, since it is larger than the sum of its proper divisors (10501425).

16402023 is a wasteful number, since it uses less digits than its factorization.

16402023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 16402023 is about 4049.9411106830. The cubic root of 16402023 is about 254.0772648155.

Adding to 16402023 its reverse (32020461), we get a palindrome (48422484).

It can be divided in two parts, 1640 and 2023, that added together give a palindrome (3663).

The spelling of 16402023 in words is "sixteen million, four hundred two thousand, twenty-three".