20291911048 has 64 divisors (see below), whose sum is σ = 39207168000. Its totient is φ = 9842133312.

The previous prime is 20291910997. The next prime is 20291911049. The reversal of 20291911048 is 84011919202.

It is a junction number, because it is equal to n+sod(n) for n = 20291910998 and 20291911016.

It is not an unprimeable number, because it can be changed into a prime (20291911049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19529713 + ... + 19530751.

It is an arithmetic number, because the mean of its divisors is an integer number (612612000).

Almost surely, 2^20291911048 is an apocalyptic number.

It is an amenable number.

20291911048 is a deficient number, since it is larger than the sum of its proper divisors (18915256952).

20291911048 is a wasteful number, since it uses less digits than its factorization.

20291911048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 20291911048 in words is "twenty billion, two hundred ninety-one million, nine hundred eleven thousand, forty-eight".