12423023402 has 4 divisors (see below), whose sum is σ = 18634535106. Its totient is φ = 6211511700.

The previous prime is 12423023399. The next prime is 12423023447. The reversal of 12423023402 is 20432032421.

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., 7175614681 + 5247408721 = 84709^2 + 72439^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105755849 + ... + 3105755852.

Almost surely, 2^12423023402 is an apocalyptic number.

12423023402 is a deficient number, since it is larger than the sum of its proper divisors (6211511704).

12423023402 is an equidigital number, since it uses as much as digits as its factorization.

12423023402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211511703.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 12423023402 its reverse (20432032421), we get a palindrome (32855055823).

The spelling of 12423023402 in words is "twelve billion, four hundred twenty-three million, twenty-three thousand, four hundred two".