20969045828 has 36 divisors (see below), whose sum is σ = 38999708160. Its totient is φ = 9863148672.

The previous prime is 20969045827. The next prime is 20969045831. The reversal of 20969045828 is 82854096902.

It is a self number, because there is not a number n which added to its sum of digits gives 20969045828.

It is not an unprimeable number, because it can be changed into a prime (20969045821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4713101 + ... + 4717547.

Almost surely, 2^20969045828 is an apocalyptic number.

It is an amenable number.

20969045828 is a deficient number, since it is larger than the sum of its proper divisors (18030662332).

20969045828 is a wasteful number, since it uses less digits than its factorization.

20969045828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8564 (or 8545 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 20969045828 in words is "twenty billion, nine hundred sixty-nine million, forty-five thousand, eight hundred twenty-eight".