20748695816 has 16 divisors (see below), whose sum is σ = 38992430400. Its totient is φ = 10350714384.

The previous prime is 20748695771. The next prime is 20748695843. The reversal of 20748695816 is 61859684702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2950460 + ... + 2957483.

It is an arithmetic number, because the mean of its divisors is an integer number (2437026900).

Almost surely, 2^20748695816 is an apocalyptic number.

It is an amenable number.

20748695816 is a deficient number, since it is larger than the sum of its proper divisors (18243734584).

20748695816 is a wasteful number, since it uses less digits than its factorization.

20748695816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5908388 (or 5908384 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 20748695816 in words is "twenty billion, seven hundred forty-eight million, six hundred ninety-five thousand, eight hundred sixteen".