21404572076 has 24 divisors (see below), whose sum is σ = 38510420256. Its totient is φ = 10402197120.

The previous prime is 21404572061. The next prime is 21404572093. The reversal of 21404572076 is 67027540412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68336 + ... + 217896.

It is an arithmetic number, because the mean of its divisors is an integer number (1604600844).

Almost surely, 2^21404572076 is an apocalyptic number.

It is an amenable number.

21404572076 is a deficient number, since it is larger than the sum of its proper divisors (17105848180).

21404572076 is a wasteful number, since it uses less digits than its factorization.

21404572076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150569 (or 150567 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 38.

The spelling of 21404572076 in words is "twenty-one billion, four hundred four million, five hundred seventy-two thousand, seventy-six".