403203112020 has 72 divisors (see below), whose sum is σ = 1235158895880. Its totient is φ = 106456262400.

The previous prime is 403203112003. The next prime is 403203112021. The reversal of 403203112020 is 20211302304.

It can be written as a sum of positive squares in 4 ways, for example, as 135638997264 + 267564114756 = 368292^2 + 517266^2 .

It is a super-2 number, since 2×403203112020² (a number of 24 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 = 403203111984 and 403203112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403203112021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11071015 + ... + 11107374.

It is an arithmetic number, because the mean of its divisors is an integer number (17154984665).

Almost surely, 2^403203112020 is an apocalyptic number.

It is an amenable number.

403203112020 is an abundant number, since it is smaller than the sum of its proper divisors (831955783860).

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

403203112020 is a wasteful number, since it uses less digits than its factorization.

403203112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22178505 (or 22178500 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 403203112020 its reverse (20211302304), we get a palindrome (423414414324).

The spelling of 403203112020 in words is "four hundred three billion, two hundred three million, one hundred twelve thousand, twenty".