15420081542 has 32 divisors (see below), whose sum is σ = 23774028960. Its totient is φ = 7498552320.

The previous prime is 15420081539. The next prime is 15420081569. The reversal of 15420081542 is 24518002451.

It is a junction number, because it is equal to n+sod(n) for n = 15420081499 and 15420081508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8948693 + ... + 8950415.

It is an arithmetic number, because the mean of its divisors is an integer number (742938405).

Almost surely, 2^15420081542 is an apocalyptic number.

15420081542 is a deficient number, since it is larger than the sum of its proper divisors (8353947418).

15420081542 is a wasteful number, since it uses less digits than its factorization.

15420081542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568.

The product of its (nonzero) digits is 12800, while the sum is 32.

Adding to 15420081542 its reverse (24518002451), we get a palindrome (39938083993).

The spelling of 15420081542 in words is "fifteen billion, four hundred twenty million, eighty-one thousand, five hundred forty-two".