20283826561 has 16 divisors (see below), whose sum is σ = 21447417600. Its totient is φ = 19129989888.

The previous prime is 20283826547. The next prime is 20283826579. The reversal of 20283826561 is 16562838202.

It is a cyclic number.

It is not a de Polignac number, because 20283826561 - 2²¹ = 20281729409 is a prime.

It is a super-2 number, since 2×20283826561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20283827561) 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, 8288040 + ... + 8290486.

It is an arithmetic number, because the mean of its divisors is an integer number (1340463600).

Almost surely, 2^20283826561 is an apocalyptic number.

It is an amenable number.

20283826561 is a deficient number, since it is larger than the sum of its proper divisors (1163591039).

20283826561 is a wasteful number, since it uses less digits than its factorization.

20283826561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 20283826561 in words is "twenty billion, two hundred eighty-three million, eight hundred twenty-six thousand, five hundred sixty-one".