23145402 has 32 divisors (see below), whose sum is σ = 54198144. Its totient is φ = 6451200.

The previous prime is 23145391. The next prime is 23145407. The reversal of 23145402 is 20454132.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (23145407) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 4999 + ... + 8442.

It is an arithmetic number, because the mean of its divisors is an integer number (1693692).

Almost surely, 2^23145402 is an apocalyptic number.

23145402 is an abundant number, since it is smaller than the sum of its proper divisors (31052742).

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

23145402 is a wasteful number, since it uses less digits than its factorization.

23145402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13494.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 23145402 is about 4810.9668466952. The cubic root of 23145402 is about 284.9847206336.

Adding to 23145402 its reverse (20454132), we get a palindrome (43599534).

The spelling of 23145402 in words is "twenty-three million, one hundred forty-five thousand, four hundred two".