23421431402 has 4 divisors (see below), whose sum is σ = 35132147106. Its totient is φ = 11710715700.

The previous prime is 23421431389. The next prime is 23421431441. The reversal of 23421431402 is 20413412432.

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., 23265705961 + 155725441 = 152531^2 + 12479^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5855357849 + ... + 5855357852.

Almost surely, 2^23421431402 is an apocalyptic number.

23421431402 is a deficient number, since it is larger than the sum of its proper divisors (11710715704).

23421431402 is a wasteful number, since it uses less digits than its factorization.

23421431402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11710715703.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 23421431402 its reverse (20413412432), we get a palindrome (43834843834).

The spelling of 23421431402 in words is "twenty-three billion, four hundred twenty-one million, four hundred thirty-one thousand, four hundred two".