20362566021 has 32 divisors (see below), whose sum is σ = 32845148160. Its totient is φ = 10973237184.

The previous prime is 20362566013. The next prime is 20362566023. The reversal of 20362566021 is 12066526302.

It is not a de Polignac number, because 20362566021 - 2³ = 20362566013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20362566023) 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 31 ways as a sum of consecutive naturals, for example, 362605 + ... + 414978.

It is an arithmetic number, because the mean of its divisors is an integer number (1026410880).

Almost surely, 2^20362566021 is an apocalyptic number.

20362566021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20362566021 is a deficient number, since it is larger than the sum of its proper divisors (12482582139).

20362566021 is a wasteful number, since it uses less digits than its factorization.

20362566021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777665.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 20362566021 in words is "twenty billion, three hundred sixty-two million, five hundred sixty-six thousand, twenty-one".