21377875046 has 16 divisors (see below), whose sum is σ = 35302916880. Its totient is φ = 9628066080.

The previous prime is 21377875039. The next prime is 21377875087. The reversal of 21377875046 is 64057877312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21377874985 and 21377875003.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4455041 + ... + 4459836.

It is an arithmetic number, because the mean of its divisors is an integer number (2206432305).

Almost surely, 2^21377875046 is an apocalyptic number.

21377875046 is a deficient number, since it is larger than the sum of its proper divisors (13925041834).

21377875046 is a wasteful number, since it uses less digits than its factorization.

21377875046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914999.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 21377875046 in words is "twenty-one billion, three hundred seventy-seven million, eight hundred seventy-five thousand, forty-six".