402242030244020 has 24 divisors (see below), whose sum is σ = 850874017266504. Its totient is φ = 159722382811136.

The previous prime is 402242030244013. The next prime is 402242030244031. The reversal of 402242030244020 is 20442030242204.

It can be written as a sum of positive squares in 4 ways, for example, as 13173989284 + 402228856254736 = 114778^2 + 20055644^2 .

It is a super-2 number, since 2×402242030244020² (a number of 30 digits) contains 22 as substring.

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, 73401827597 + ... + 73401833076.

It is an arithmetic number, because the mean of its divisors is an integer number (35453084052771).

Almost surely, 2^{402242030244020} is an apocalyptic number.

It is an amenable number.

402242030244020 is an abundant number, since it is smaller than the sum of its proper divisors (448631987022484).

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

402242030244020 is a wasteful number, since it uses less digits than its factorization.

402242030244020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146803660819 (or 146803660817 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 29.

Adding to 402242030244020 its reverse (20442030242204), we get a palindrome (422684060486224).

The spelling of 402242030244020 in words is "four hundred two trillion, two hundred forty-two billion, thirty million, two hundred forty-four thousand, twenty".