21746703078 has 48 divisors (see below), whose sum is σ = 47427082560. Its totient is φ = 7201395072.

The previous prime is 21746703049. The next prime is 21746703089. The reversal of 21746703078 is 87030764712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6503475 + ... + 6506817.

It is an arithmetic number, because the mean of its divisors is an integer number (988064220).

Almost surely, 2^21746703078 is an apocalyptic number.

21746703078 is an abundant number, since it is smaller than the sum of its proper divisors (25680379482).

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

21746703078 is a wasteful number, since it uses less digits than its factorization.

21746703078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5613 (or 5610 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 21746703078 in words is "twenty-one billion, seven hundred forty-six million, seven hundred three thousand, seventy-eight".