123420312020 has 24 divisors (see below), whose sum is σ = 261604927584. Its totient is φ = 48906739616.

The previous prime is 123420312019. The next prime is 123420312023. The reversal of 123420312020 is 20213024321.

It is a super-2 number, since 2×123420312020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123420311983 and 123420312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123420312023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28834382 + ... + 28838661.

It is an arithmetic number, because the mean of its divisors is an integer number (10900205316).

Almost surely, 2^123420312020 is an apocalyptic number.

123420312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123420312020 is an abundant number, since it is smaller than the sum of its proper divisors (138184615564).

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

123420312020 is a wasteful number, since it uses less digits than its factorization.

123420312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57673159 (or 57673157 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 123420312020 its reverse (20213024321), we get a palindrome (143633336341).

The spelling of 123420312020 in words is "one hundred twenty-three billion, four hundred twenty million, three hundred twelve thousand, twenty".