20111372022 has 16 divisors (see below), whose sum is σ = 45968850432. Its totient is φ = 5746106280.

The previous prime is 20111371993. The next prime is 20111372059. The reversal of 20111372022 is 22027311102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20111372022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239421054 + ... + 239421137.

It is an arithmetic number, because the mean of its divisors is an integer number (2873053152).

Almost surely, 2^20111372022 is an apocalyptic number.

20111372022 is an abundant number, since it is smaller than the sum of its proper divisors (25857478410).

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

20111372022 is a wasteful number, since it uses less digits than its factorization.

20111372022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478842203.

The product of its (nonzero) digits is 336, while the sum is 21.

Adding to 20111372022 its reverse (22027311102), we get a palindrome (42138683124).

The spelling of 20111372022 in words is "twenty billion, one hundred eleven million, three hundred seventy-two thousand, twenty-two".