20445450158821 has 16 divisors (see below), whose sum is σ = 20508404224000. Its totient is φ = 20382601747248.

The previous prime is 20445450158807. The next prime is 20445450158863. The reversal of 20445450158821 is 12885105454402.

It is a cyclic number.

It is not a de Polignac number, because 20445450158821 - 2¹¹ = 20445450156773 is a prime.

It is a super-2 number, since 2×20445450158821² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445450158891) 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, 2112346660 + ... + 2112356338.

It is an arithmetic number, because the mean of its divisors is an integer number (1281775264000).

Almost surely, 2^{20445450158821} is an apocalyptic number.

It is an amenable number.

20445450158821 is a deficient number, since it is larger than the sum of its proper divisors (62954065179).

20445450158821 is a wasteful number, since it uses less digits than its factorization.

20445450158821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14488.

The product of its (nonzero) digits is 2048000, while the sum is 49.

The spelling of 20445450158821 in words is "twenty trillion, four hundred forty-five billion, four hundred fifty million, one hundred fifty-eight thousand, eight hundred twenty-one".