20420123022 has 96 divisors (see below), whose sum is σ = 48011745600. Its totient is φ = 6235232256.

The previous prime is 20420122973. The next prime is 20420123033. The reversal of 20420123022 is 22032102402.

20420123022 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×20420123022² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20420122986 and 20420123004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22219479 + ... + 22220397.

It is an arithmetic number, because the mean of its divisors is an integer number (500122350).

Almost surely, 2^20420123022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20420123022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24005872800).

20420123022 is an abundant number, since it is smaller than the sum of its proper divisors (27591622578).

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

20420123022 is a wasteful number, since it uses less digits than its factorization.

20420123022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20420123022 its reverse (22032102402), we get a palindrome (42452225424).

The spelling of 20420123022 in words is "twenty billion, four hundred twenty million, one hundred twenty-three thousand, twenty-two".