23440420202 has 4 divisors (see below), whose sum is σ = 35160630306. Its totient is φ = 11720210100.

The previous prime is 23440420177. The next prime is 23440420207. The reversal of 23440420202 is 20202404432.

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

It can be written as a sum of positive squares in only one way, i.e., 18103971601 + 5336448601 = 134551^2 + 73051^2 .

It is not an unprimeable number, because it can be changed into a prime (23440420207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860105049 + ... + 5860105052.

Almost surely, 2^23440420202 is an apocalyptic number.

23440420202 is a deficient number, since it is larger than the sum of its proper divisors (11720210104).

23440420202 is a wasteful number, since it uses less digits than its factorization.

23440420202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11720210103.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 23440420202 its reverse (20202404432), we get a palindrome (43642824634).

The spelling of 23440420202 in words is "twenty-three billion, four hundred forty million, four hundred twenty thousand, two hundred two".