20442502 has 16 divisors (see below), whose sum is σ = 31122000. Its totient is φ = 10069920.

The previous prime is 20442479. The next prime is 20442511. The reversal of 20442502 is 20524402.

It is a self number, because there is not a number n which added to its sum of digits gives 20442502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53749 + ... + 54127.

It is an arithmetic number, because the mean of its divisors is an integer number (1945125).

Almost surely, 2^20442502 is an apocalyptic number.

20442502 is a deficient number, since it is larger than the sum of its proper divisors (10679498).

20442502 is a wasteful number, since it uses less digits than its factorization.

20442502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 20442502 is about 4521.3385186248. The cubic root of 20442502 is about 273.4290685204.

Adding to 20442502 its reverse (20524402), we get a palindrome (40966904).

The spelling of 20442502 in words is "twenty million, four hundred forty-two thousand, five hundred two".