15534420434 has 32 divisors (see below), whose sum is σ = 25480707840. Its totient is φ = 7059528000.

The previous prime is 15534420431. The next prime is 15534420449. The reversal of 15534420434 is 43402443551.

It is a junction number, because it is equal to n+sod(n) for n = 15534420394 and 15534420403.

It is not an unprimeable number, because it can be changed into a prime (15534420431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525259 + ... + 1535409.

It is an arithmetic number, because the mean of its divisors is an integer number (796272120).

Almost surely, 2^15534420434 is an apocalyptic number.

15534420434 is a deficient number, since it is larger than the sum of its proper divisors (9946287406).

15534420434 is a wasteful number, since it uses less digits than its factorization.

15534420434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 15534420434 its reverse (43402443551), we get a palindrome (58936863985).

The spelling of 15534420434 in words is "fifteen billion, five hundred thirty-four million, four hundred twenty thousand, four hundred thirty-four".