21479071246 has 32 divisors (see below), whose sum is σ = 35040107520. Its totient is φ = 9837158400.

The previous prime is 21479071223. The next prime is 21479071279. The reversal of 21479071246 is 64217097412.

It is a super-2 number, since 2×21479071246² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1390606 + ... + 1405966.

It is an arithmetic number, because the mean of its divisors is an integer number (1095003360).

Almost surely, 2^21479071246 is an apocalyptic number.

21479071246 is a deficient number, since it is larger than the sum of its proper divisors (13561036274).

21479071246 is a wasteful number, since it uses less digits than its factorization.

21479071246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16600.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 21479071246 in words is "twenty-one billion, four hundred seventy-nine million, seventy-one thousand, two hundred forty-six".