20122165552 has 40 divisors (see below), whose sum is σ = 39125630720. Its totient is φ = 10025294400.

The previous prime is 20122165537. The next prime is 20122165561. The reversal of 20122165552 is 25556122102.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7886677 + ... + 7889227.

It is an arithmetic number, because the mean of its divisors is an integer number (978140768).

Almost surely, 2^20122165552 is an apocalyptic number.

It is an amenable number.

20122165552 is a deficient number, since it is larger than the sum of its proper divisors (19003465168).

20122165552 is a wasteful number, since it uses less digits than its factorization.

20122165552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121 (or 4115 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 20122165552 its reverse (25556122102), we get a palindrome (45678287654).

The spelling of 20122165552 in words is "twenty billion, one hundred twenty-two million, one hundred sixty-five thousand, five hundred fifty-two".