23420042011 has 4 divisors (see below), whose sum is σ = 23542660224. Its totient is φ = 23297423800.

The previous prime is 23420041999. The next prime is 23420042069. The reversal of 23420042011 is 11024002432.

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 23420042011 - 2¹¹ = 23420039963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23420042011.

It is not an unprimeable number, because it can be changed into a prime (23420042311) 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, 61308820 + ... + 61309201.

It is an arithmetic number, because the mean of its divisors is an integer number (5885665056).

Almost surely, 2^23420042011 is an apocalyptic number.

23420042011 is a deficient number, since it is larger than the sum of its proper divisors (122618213).

23420042011 is a wasteful number, since it uses less digits than its factorization.

23420042011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122618212.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 23420042011 its reverse (11024002432), we get a palindrome (34444044443).

The spelling of 23420042011 in words is "twenty-three billion, four hundred twenty million, forty-two thousand, eleven".