15421430709 has 12 divisors (see below), whose sum is σ = 22749345216. Its totient is φ = 10062209832.

The previous prime is 15421430681. The next prime is 15421430729. The reversal of 15421430709 is 90703412451.

15421430709 is a `hidden beast` number, since 1 + 542 + 1 + 43 + 0 + 70 + 9 = 666.

It is not a de Polignac number, because 15421430709 - 2¹² = 15421426613 is a prime.

It is a super-2 number, since 2×15421430709² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15421430729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18228219 + ... + 18229064.

It is an arithmetic number, because the mean of its divisors is an integer number (1895778768).

Almost surely, 2^15421430709 is an apocalyptic number.

It is an amenable number.

15421430709 is a deficient number, since it is larger than the sum of its proper divisors (7327914507).

15421430709 is a wasteful number, since it uses less digits than its factorization.

15421430709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36457336 (or 36457333 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 15421430709 in words is "fifteen billion, four hundred twenty-one million, four hundred thirty thousand, seven hundred nine".