21076657042 has 48 divisors (see below), whose sum is σ = 37009592928. Its totient is φ = 8975836800.

The previous prime is 21076657037. The next prime is 21076657051. The reversal of 21076657042 is 24075667012.

It is a junction number, because it is equal to n+sod(n) for n = 21076656986 and 21076657004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12063613 + ... + 12065359.

It is an arithmetic number, because the mean of its divisors is an integer number (771033186).

Almost surely, 2^21076657042 is an apocalyptic number.

21076657042 is a deficient number, since it is larger than the sum of its proper divisors (15932935886).

21076657042 is a wasteful number, since it uses less digits than its factorization.

21076657042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 21076657042 in words is "twenty-one billion, seventy-six million, six hundred fifty-seven thousand, forty-two".