20910244428 has 72 divisors (see below), whose sum is σ = 53116605360. Its totient is φ = 6935869440.

The previous prime is 20910244427. The next prime is 20910244451. The reversal of 20910244428 is 82444201902.

20910244428 is a `hidden beast` number, since 209 + 1 + 0 + 2 + 4 + 442 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20910244392 and 20910244401.

It is not an unprimeable number, because it can be changed into a prime (20910244427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6874588 + ... + 6877628.

It is an arithmetic number, because the mean of its divisors is an integer number (737730630).

Almost surely, 2^20910244428 is an apocalyptic number.

It is an amenable number.

20910244428 is an abundant number, since it is smaller than the sum of its proper divisors (32206360932).

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

20910244428 is a wasteful number, since it uses less digits than its factorization.

20910244428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927 (or 3922 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 20910244428 in words is "twenty billion, nine hundred ten million, two hundred forty-four thousand, four hundred twenty-eight".