20569949452 has 24 divisors (see below), whose sum is σ = 38776882256. Its totient is φ = 9491266368.

The previous prime is 20569949443. The next prime is 20569949479. The reversal of 20569949452 is 25494996502.

It is a junction number, because it is equal to n+sod(n) for n = 20569949393 and 20569949402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149023 + ... + 251689.

Almost surely, 2^20569949452 is an apocalyptic number.

It is an amenable number.

20569949452 is a deficient number, since it is larger than the sum of its proper divisors (18206932804).

20569949452 is a wasteful number, since it uses less digits than its factorization.

20569949452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106537 (or 106535 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 20569949452 in words is "twenty billion, five hundred sixty-nine million, nine hundred forty-nine thousand, four hundred fifty-two".