15421420105 has 16 divisors (see below), whose sum is σ = 22776251904. Its totient is φ = 9761250240.

The previous prime is 15421420043. The next prime is 15421420109. The reversal of 15421420105 is 50102412451.

It is not a de Polignac number, because 15421420105 - 2¹³ = 15421411913 is a prime.

It is a super-2 number, since 2×15421420105² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15421420105.

It is not an unprimeable number, because it can be changed into a prime (15421420109) 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, 16946161 + ... + 16947070.

It is an arithmetic number, because the mean of its divisors is an integer number (1423515744).

Almost surely, 2^15421420105 is an apocalyptic number.

It is an amenable number.

15421420105 is a deficient number, since it is larger than the sum of its proper divisors (7354831799).

15421420105 is a wasteful number, since it uses less digits than its factorization.

15421420105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33893256.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 15421420105 its reverse (50102412451), we get a palindrome (65523832556).

The spelling of 15421420105 in words is "fifteen billion, four hundred twenty-one million, four hundred twenty thousand, one hundred five".