21478596930 has 128 divisors (see below), whose sum is σ = 68903884800. Its totient is φ = 4650996672.

The previous prime is 21478596929. The next prime is 21478596959. The reversal of 21478596930 is 3969587412.

21478596930 is a `hidden beast` number, since 2 + 1 + 47 + 8 + 596 + 9 + 3 + 0 = 666.

It is a super-2 number, since 2×21478596930² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 263152 + ... + 334971.

It is an arithmetic number, because the mean of its divisors is an integer number (538311600).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21478596930 = 42957193860, but 3⋅21478596930 = 64435790790 is not.

Almost surely, 2^21478596930 is an apocalyptic number.

21478596930 is an abundant number, since it is smaller than the sum of its proper divisors (47425287870).

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

21478596930 is a wasteful number, since it uses less digits than its factorization.

21478596930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598165 (or 598159 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 21478596930 in words is "twenty-one billion, four hundred seventy-eight million, five hundred ninety-six thousand, nine hundred thirty".