15402423042 has 12 divisors (see below), whose sum is σ = 33371916630. Its totient is φ = 5134141008.

The previous prime is 15402423007. The next prime is 15402423097. The reversal of 15402423042 is 24032420451.

It can be written as a sum of positive squares in only one way, i.e., 12651525441 + 2750897601 = 112479^2 + 52449^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15402422997 and 15402423015.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 427845067 + ... + 427845102.

Almost surely, 2^15402423042 is an apocalyptic number.

15402423042 is an abundant number, since it is smaller than the sum of its proper divisors (17969493588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15402423042 is a wasteful number, since it uses less digits than its factorization.

15402423042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855690177 (or 855690174 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 15402423042 its reverse (24032420451), we get a palindrome (39434843493).

The spelling of 15402423042 in words is "fifteen billion, four hundred two million, four hundred twenty-three thousand, forty-two".