20261021733 has 12 divisors (see below), whose sum is σ = 29274001120. Its totient is φ = 13503618216.

The previous prime is 20261021723. The next prime is 20261021741. The reversal of 20261021733 is 33712016202.

20261021733 is a `hidden beast` number, since 2 + 0 + 2 + 610 + 2 + 17 + 33 = 666.

It is not a de Polignac number, because 20261021733 - 2²² = 20256827429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20261021697 and 20261021706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261021723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276193 + ... + 341766.

Almost surely, 2^20261021733 is an apocalyptic number.

It is an amenable number.

20261021733 is a deficient number, since it is larger than the sum of its proper divisors (9012979387).

20261021733 is a wasteful number, since it uses less digits than its factorization.

20261021733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621608 (or 621605 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

Adding to 20261021733 its reverse (33712016202), we get a palindrome (53973037935).

The spelling of 20261021733 in words is "twenty billion, two hundred sixty-one million, twenty-one thousand, seven hundred thirty-three".