42123433402 has 4 divisors (see below), whose sum is σ = 63185150106. Its totient is φ = 21061716700.

The previous prime is 42123433399. The next prime is 42123433403. The reversal of 42123433402 is 20433432124.

42123433402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 41379289561 + 744143841 = 203419^2 + 27279^2 .

It is not an unprimeable number, because it can be changed into a prime (42123433403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10530858349 + ... + 10530858352.

Almost surely, 2^42123433402 is an apocalyptic number.

42123433402 is a deficient number, since it is larger than the sum of its proper divisors (21061716704).

42123433402 is a wasteful number, since it uses less digits than its factorization.

42123433402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21061716703.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 42123433402 its reverse (20433432124), we get a palindrome (62556865526).

The spelling of 42123433402 in words is "forty-two billion, one hundred twenty-three million, four hundred thirty-three thousand, four hundred two".