21476030340 has 24 divisors (see below), whose sum is σ = 60132885120. Its totient is φ = 5726941408.

The previous prime is 21476030321. The next prime is 21476030383. The reversal of 21476030340 is 4303067412.

It is a super-2 number, since 2×21476030340² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21476030298 and 21476030307.

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 7 ways as a sum of consecutive naturals, for example, 178966860 + ... + 178966979.

It is an arithmetic number, because the mean of its divisors is an integer number (2505536880).

Almost surely, 2^21476030340 is an apocalyptic number.

21476030340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21476030340 is an abundant number, since it is smaller than the sum of its proper divisors (38656854780).

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

21476030340 is a wasteful number, since it uses less digits than its factorization.

21476030340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357933851 (or 357933849 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

Adding to 21476030340 its reverse (4303067412), we get a palindrome (25779097752).

The spelling of 21476030340 in words is "twenty-one billion, four hundred seventy-six million, thirty thousand, three hundred forty".