20106456533 has 4 divisors (see below), whose sum is σ = 20122711980. Its totient is φ = 20090201088.

The previous prime is 20106456467. The next prime is 20106456619. The reversal of 20106456533 is 33565460102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12754765969 + 7351690564 = 112937^2 + 85742^2 .

It is a cyclic number.

It is not a de Polignac number, because 20106456533 - 2⁸ = 20106456277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20106456493 and 20106456502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106453533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8125868 + ... + 8128341.

It is an arithmetic number, because the mean of its divisors is an integer number (5030677995).

Almost surely, 2^20106456533 is an apocalyptic number.

It is an amenable number.

20106456533 is a deficient number, since it is larger than the sum of its proper divisors (16255447).

20106456533 is a wasteful number, since it uses less digits than its factorization.

20106456533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16255446.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 20106456533 in words is "twenty billion, one hundred six million, four hundred fifty-six thousand, five hundred thirty-three".