20111215622 has 4 divisors (see below), whose sum is σ = 30166823436. Its totient is φ = 10055607810.

The previous prime is 20111215603. The next prime is 20111215637. The reversal of 20111215622 is 22651211102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027803904 + ... + 5027803907.

It is an arithmetic number, because the mean of its divisors is an integer number (7541705859).

Almost surely, 2^20111215622 is an apocalyptic number.

20111215622 is a deficient number, since it is larger than the sum of its proper divisors (10055607814).

20111215622 is a wasteful number, since it uses less digits than its factorization.

20111215622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10055607813.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 20111215622 its reverse (22651211102), we get a palindrome (42762426724).

The spelling of 20111215622 in words is "twenty billion, one hundred eleven million, two hundred fifteen thousand, six hundred twenty-two".