402000402020 has 24 divisors (see below), whose sum is σ = 964800965184. Its totient is φ = 137828709216.

The previous prime is 402000402017. The next prime is 402000402061. The reversal of 402000402020 is 20204000204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 402000401986 and 402000402004.

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, 1435715582 + ... + 1435715861.

It is an arithmetic number, because the mean of its divisors is an integer number (40200040216).

Almost surely, 2^402000402020 is an apocalyptic number.

It is an amenable number.

402000402020 is an abundant number, since it is smaller than the sum of its proper divisors (562800563164).

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

402000402020 is a wasteful number, since it uses less digits than its factorization.

402000402020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871431459 (or 2871431457 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 402000402020 its reverse (20204000204), we get a palindrome (422204402224).

The spelling of 402000402020 in words is "four hundred two billion, four hundred two thousand, twenty".