20220436660 has 24 divisors (see below), whose sum is σ = 44309131776. Its totient is φ = 7736514720.

The previous prime is 20220436631. The next prime is 20220436711. The reversal of 20220436660 is 6663402202.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21978276 + ... + 21979195.

It is an arithmetic number, because the mean of its divisors is an integer number (1846213824).

Almost surely, 2^20220436660 is an apocalyptic number.

20220436660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220436660 is an abundant number, since it is smaller than the sum of its proper divisors (24088695116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20220436660 is a wasteful number, since it uses less digits than its factorization.

20220436660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43957503 (or 43957501 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 20220436660 its reverse (6663402202), we get a palindrome (26883838862).

The spelling of 20220436660 in words is "twenty billion, two hundred twenty million, four hundred thirty-six thousand, six hundred sixty".