20152111422 has 64 divisors (see below), whose sum is σ = 42198266880. Its totient is φ = 6410686464.

The previous prime is 20152111391. The next prime is 20152111429. The reversal of 20152111422 is 22411125102.

It is a super-2 number, since 2×20152111422² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152111429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1971958 + ... + 1982150.

It is an arithmetic number, because the mean of its divisors is an integer number (659347920).

Almost surely, 2^20152111422 is an apocalyptic number.

20152111422 is an abundant number, since it is smaller than the sum of its proper divisors (22046155458).

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

20152111422 is a wasteful number, since it uses less digits than its factorization.

20152111422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10417.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 20152111422 its reverse (22411125102), we get a palindrome (42563236524).

The spelling of 20152111422 in words is "twenty billion, one hundred fifty-two million, one hundred eleven thousand, four hundred twenty-two".